GCSE BIOLOGY 8461/1F Paper 1 Foundation Tier Mark scheme June 2021 Version: 1.0 Final Mark Scheme * june2021 84611F /MS *

GCSE
BIOLOGY
8461/1F
Paper 1 Foundation Tier
Mark scheme
June 2021
Version: 1.0 Final Mark Scheme
* june2021 84611F /MS *

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to questions and that every associate understands and applies it in the same correct way. As preparation for standardisation each associate analyses a number of students’ scripts. Alternative answers not already covered by the mark scheme are discussed and legislated for. If, after the standardisation process, associates encounter unusual answers which have not been raised they are required to refer these to the Lead Examiner. It must be stressed that a mark scheme is a working document, in many cases further developed and expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark schemes on the basis of one year’s document should be avoided; whilst the guiding principles of assessment remain constant, details will change, depending on the content of a particular examination paper. Further copies of this mark scheme are available from aqa.org.uk Co pyright information AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this booklet for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any material that is acknowledged to a third party even for internal use within the centre. Copyright © 2021 AQA and its licensors. All rights reserved. 2

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant
questions, by a panel of subject teachers. This mark scheme includes any amendments made at the
standardisation events which all associates participate in and is the scheme which was used by them in
this examination. The standardisation process ensures that the mark scheme covers the students’
responses to questions and that every associate understands and applies it in the same correct way.
As preparation for standardisation each associate analyses a number of students’ scripts. Alternative
answers not already covered by the mark scheme are discussed and legislated for. If, after the
standardisation process, associates encounter unusual answers which have not been raised they are
required to refer these to the Lead Examiner.
It must be stressed that a mark scheme is a working document, in many cases further developed and
expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
assessment remain constant, details will change, depending on the content of a particular examination
paper.
Further copies of this mark scheme are available from aqa.org.uk
Co pyright information
AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this booklet for their own
internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any material that is acknowledged to a third
party even for internal use within the centre.
Copyright © 2021 AQA and its licensors. All rights reserved.
2

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 Information to Examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the Examiner make his or her judgement • the Assessment Objectives, level of demand and specification content that each question is intended to cover. The extra information is aligned to the appropriate answer in the left-hand part of the mark scheme and should only be applied to that item in the mark scheme. At the beginning of a part of a question a reminder may be given, for example: where consequential marking needs to be considered in a calculation; or the answer may be on the diagram or at a different place on the script. In general the right-hand side of the mark scheme is there to provide those extra details which confuse the main part of the mark scheme yet may be helpful in ensuring that marking is straightforward and consistent. 2. Emboldening and underlining 2.1 In a list of acceptable answers where more than one mark is available ‘any two from’ is used, with the number of marks emboldened. Each of the following bullet points is a potential mark. 2.2 A bold and is used to indicate that both parts of the answer are required to award the mark. 2.3 Alternative answers acceptable for a mark are indicated by the use of or . Different terms in the mark scheme are shown by a / ; eg allow smooth / free movement. 2.4 Any wording that is underlined is essential for the marking point to be awarded. 3

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
Information to Examiners
1. General
The mark scheme for each question shows:
• the marks available for each part of the question
• the total marks available for the question
• the typical answer or answers which are expected
• extra information to help the Examiner make his or her judgement
• the Assessment Objectives, level of demand and specification content that each question is intended
to cover.
The extra information is aligned to the appropriate answer in the left-hand part of the mark scheme and
should only be applied to that item in the mark scheme.
At the beginning of a part of a question a reminder may be given, for example: where consequential
marking needs to be considered in a calculation; or the answer may be on the diagram or at a different
place on the script.
In general the right-hand side of the mark scheme is there to provide those extra details which confuse
the main part of the mark scheme yet may be helpful in ensuring that marking is straightforward and
consistent.
2. Emboldening and underlining
2.1 In a list of acceptable answers where more than one mark is available ‘any two from’ is used, with
the number of marks emboldened. Each of the following bullet points is a
potential mark.
2.2 A bold and is used to indicate that both parts of the answer are required to award the mark.
2.3 Alternative answers acceptable for a mark are indicated by the use of or . Different terms in the
mark scheme are shown by a / ; eg allow smooth / free movement.
2.4 Any wording that is underlined is essential for the marking point to be awarded.
3

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 3. Marking points 3.1 Marking of lists This applies to questions requiring a set number of responses, but for which students have provided extra responses. The general principle to be followed in such a situation is that ‘right + wrong = wrong’. Each error/contradiction negates each correct response. So, if the number of error/contradictions equals or exceeds the number of marks available for the question, no marks can be awarded. However, responses considered to be neutral (indicated as * in example 1) are not penalised. Example 1: What is the pH of an acidic solution? [1 mark] Student Response Marks awarded 1 green, 5 0 2 red*, 5 1 3 red*, 8 0 Example 2: Name two planets in the solar system. [2 marks] Student Response Marks awarded 1 Neptune, Mars, Moon 1 2 Neptune, Sun, Mars, 0 Moon 3.2 Use of chemical symbols/formulae If a student writes a chemical symbol/formula instead of a required chemical name, full credit can be given if the symbol/formula is correct and if, in the context of the question, such action is appropriate. 3.3 Marking procedure for calculations Marks should be awarded for each stage of the calculation completed correctly, as students are instructed to show their working. Full marks can, however, be given for a correct numerical answer, without any working shown. 3.4 Interpretation of ‘it’ Answers using the word ‘it’ should be given credit only if it is clear that the ‘it’ refers to the correct subject. 4

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
3. Marking points
3.1 Marking of lists
This applies to questions requiring a set number of responses, but for which students have
provided extra responses. The general principle to be followed in such a situation is that ‘right +
wrong = wrong’.
Each error/contradiction negates each correct response. So, if the number of error/contradictions
equals or exceeds the number of marks available for the question, no marks can be awarded.
However, responses considered to be neutral (indicated as * in example 1) are not penalised.
Example 1: What is the pH of an acidic solution?
[1 mark]
Student Response Marks
awarded
1 green, 5 0
2 red*, 5 1
3 red*, 8 0
Example 2: Name two planets in the solar system.
[2 marks]
Student Response Marks awarded
1 Neptune, Mars, Moon 1
2 Neptune, Sun, Mars, 0
Moon
3.2 Use of chemical symbols/formulae
If a student writes a chemical symbol/formula instead of a required chemical name, full credit can
be given if the symbol/formula is correct and if, in the context of the question, such action is
appropriate.
3.3 Marking procedure for calculations
Marks should be awarded for each stage of the calculation completed correctly, as students are
instructed to show their working. Full marks can, however, be given for a correct numerical
answer, without any working shown.
3.4 Interpretation of ‘it’
Answers using the word ‘it’ should be given credit only if it is clear that the ‘it’ refers to the correct
subject.
4

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 3.5 Errors carried forward Any error in the answers to a structured question should be penalised once only. Papers should be constructed in such a way that the number of times errors can be carried forward is kept to a minimum. Allowances for errors carried forward are most likely to be restricted to calculation questions and should be shown by the abbreviation ecf in the marking scheme. 3.6 Phonetic spelling The phonetic spelling of correct scientific terminology should be credited unless there is a possible confusion with another technical term. 3.7 Brackets (…..) are used to indicate information which is not essential for the mark to be awarded but is included to help the examiner identify the sense of the answer required. 3.8 Allow In the mark scheme additional information, ‘allow’ is used to indicate creditworthy alternative answers. 3.9 Ignore Ignore is used when the information given is irrelevant to the question or not enough to gain the marking point. Any further correct amplification could gain the marking point. 3.10 Do not accept Do not accept means that this is a wrong answer which, even if the correct answer is given as well, will still mean that the mark is not awarded. 4. Level of response marking instructions Extended response questions are marked on level of response mark schemes. • Level of response mark schemes are broken down into levels, each of which has a descriptor. • The descriptor for the level shows the average performance for the level. • There are two marks in each level. Before you apply the mark scheme to a student’s answer, read through the answer and annotate it (as instructed) to show the qualities that are being looked for. You can then apply the mark scheme. 5

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
3.5 Errors carried forward
Any error in the answers to a structured question should be penalised once only.
Papers should be constructed in such a way that the number of times errors can be carried forward
is kept to a minimum. Allowances for errors carried forward are most likely to be restricted to
calculation questions and should be shown by the abbreviation ecf in the marking scheme.
3.6 Phonetic spelling
The phonetic spelling of correct scientific terminology should be credited unless there is a possible
confusion with another technical term.
3.7 Brackets
(…..) are used to indicate information which is not essential for the mark to be awarded but is
included to help the examiner identify the sense of the answer required.
3.8 Allow
In the mark scheme additional information, ‘allow’ is used to indicate creditworthy
alternative answers.
3.9 Ignore
Ignore is used when the information given is irrelevant to the question or not enough to gain the
marking point. Any further correct amplification could gain the marking point.
3.10 Do not accept
Do not accept means that this is a wrong answer which, even if the correct answer is given as
well, will still mean that the mark is not awarded.
4. Level of response marking instructions
Extended response questions are marked on level of response mark schemes.
• Level of response mark schemes are broken down into levels, each of which has a descriptor.
• The descriptor for the level shows the average performance for the level.
• There are two marks in each level.
Before you apply the mark scheme to a student’s answer, read through the answer and annotate it
(as instructed) to show the qualities that are being looked for. You can then apply the mark scheme.
5

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 Step 1: Determine a level Start at the lowest level of the mark scheme and use it as a ladder to see whether the answer meets the descriptor for that level. The descriptor for the level indicates the different qualities that might be seen in the student’s answer for that level. If it meets the lowest level then go to the next one and decide if it meets this level, and so on, until you have a match between the level descriptor and the answer. When assigning a level you should look at the overall quality of the answer. Do not look to penalise small and specific parts of the answer where the student has not performed quite as well as the rest. If the answer covers different aspects of different levels of the mark scheme you should use a best fit approach for defining the level. Use the variability of the response to help decide the mark within the level, ie if the response is predominantly level 2 with a small amount of level 3 material it would be placed in level 2 but be awarded a mark near the top of the level because of the level 3 content. Step 2: Determine a mark Once you have assigned a level you need to decide on the mark. The descriptors on how to allocate marks can help with this. The exemplar materials used during standardisation will help. There will be an answer in the standardising materials which will correspond with each level of the mark scheme. This answer will have been awarded a mark by the Lead Examiner. You can compare the student’s answer with the example to determine if it is the same standard, better or worse than the example. You can then use this to allocate a mark for the answer based on the Lead Examiner’s mark on the example. You may well need to read back through the answer as you apply the mark scheme to clarify points and assure yourself that the level and the mark are appropriate. Indicative content in the mark scheme is provided as a guide for examiners. It is not intended to be exhaustive and you must credit other valid points. Students do not have to cover all of the points mentioned in the indicative content to reach the highest level of the mark scheme. You should ignore any irrelevant points made. However, full marks can be awarded only if there are no incorrect statements that contradict a correct response. An answer which contains nothing of relevance to the question must be awarded no marks. 6

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
Step 1: Determine a level
Start at the lowest level of the mark scheme and use it as a ladder to see whether the answer meets
the descriptor for that level. The descriptor for the level indicates the different qualities that might be
seen in the student’s answer for that level. If it meets the lowest level then go to the next one and
decide if it meets this level, and so on, until you have a match between the level descriptor and the
answer.
When assigning a level you should look at the overall quality of the answer. Do not look to penalise
small and specific parts of the answer where the student has not performed quite as well as the rest.
If the answer covers different aspects of different levels of the mark scheme you should use a best
fit approach for defining the level.
Use the variability of the response to help decide the mark within the level, ie if the response is
predominantly level 2 with a small amount of level 3 material it would be placed in level 2 but be
awarded a mark near the top of the level because of the level 3 content.
Step 2: Determine a mark
Once you have assigned a level you need to decide on the mark. The descriptors on how to
allocate marks can help with this.
The exemplar materials used during standardisation will help. There will be an answer in the
standardising materials which will correspond with each level of the mark scheme. This answer will
have been awarded a mark by the Lead Examiner. You can compare the student’s answer with the
example to determine if it is the same standard, better or worse than the example. You can then
use this to allocate a mark for the answer based on the Lead Examiner’s mark on the example.
You may well need to read back through the answer as you apply the mark scheme to clarify points
and assure yourself that the level and the mark are appropriate.
Indicative content in the mark scheme is provided as a guide for examiners. It is not intended to be
exhaustive and you must credit other valid points. Students do not have to cover all of the points
mentioned in the indicative content to reach the highest level of the mark scheme.
You should ignore any irrelevant points made. However, full marks can be awarded only if there are
no incorrect statements that contradict a correct response.
An answer which contains nothing of relevance to the question must be awarded no marks.
6

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 01.1 1 AO3 4.1.3.1 01.2 in this order only AO1 water 1 4.1.3.2 4.1.3.3 mineral ions allow minerals / ions 1 4.2.3.2 energy 1 01.3 root hair (cell) ignore root / hair unqualified 1 AO1 4.1.1.3 4.2.3.2 01.4 large surface / area allow it has a long projection 1 AO1 allow the walls are thin 4.1.1.3 allow it has lots of mitochondria 4.2.3.2 01.5 AO1 4.1.1.3 1 1 do not accept more than one line from a box on the left 7

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
01.1 1 AO3
4.1.3.1
01.2 in this order only AO1
water 1 4.1.3.2
4.1.3.3
mineral ions allow minerals / ions 1 4.2.3.2
energy 1
01.3 root hair (cell) ignore root / hair unqualified 1 AO1
4.1.1.3
4.2.3.2
01.4 large surface / area allow it has a long projection 1 AO1
allow the walls are thin 4.1.1.3
allow it has lots of mitochondria 4.2.3.2
01.5 AO1
4.1.1.3
1
1
do not accept more than one line from a box on the left
7

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 01.6 nerve (cell) allow neuron(e) 1 AO1 ignore motor / sensory / relay 4.1.1.3 any one from: 1 • long • has branches allow myelin / fat • has insulation Total 10 8

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
01.6 nerve (cell) allow neuron(e) 1 AO1
ignore motor / sensory / relay 4.1.1.3
any one from: 1
• long
• has branches
• has insulation allow myelin / fat
Total 10
8

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 02.1 pathogens 1 AO1 4.3.1.1 02.2 viruses reproduce inside cells, 1 AO1 damaging them 4.3.1.1 02.3 any one from: 1 AO2 • they do not have a cell do not accept they do not have 4.1.1.2 membrane a cell wall • they do not have cytoplasm • they do not have a nucleus • they do not have mitochondria (like most eukaryotic cells) • they do not have ribosomes do not accept they do not have chloroplasts / chlorophyll ignore they are not living / alive ignore they can only replicate inside cells ignore virus has a protein coat 02.4 a weakened form of a virus 1 AO1 4.3.1.7 02.5 1 AO2 4.3.1.7 02.6 leaf 1 AO1 4.3.1.2 9

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
02.1 pathogens 1 AO1
4.3.1.1
02.2 viruses reproduce inside cells, 1 AO1
damaging them 4.3.1.1
02.3 any one from: 1 AO2
• they do not have a cell do not accept they do not have 4.1.1.2
membrane a cell wall
• they do not have cytoplasm
• they do not have a nucleus
• they do not have
mitochondria (like most
eukaryotic cells)
• they do not have ribosomes
do not accept they do not have
chloroplasts / chlorophyll
ignore they are not living / alive
ignore they can only replicate
inside cells
ignore virus has a protein coat
02.4 a weakened form of a virus 1 AO1
4.3.1.7
02.5 1 AO2
4.3.1.7
02.6 leaf 1 AO1
4.3.1.2
9

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 02.7 y-axis labelled rate of 1 AO2 photosynthesis in arbitrary units 4.4.1.1 correct scale 1 all bars plotted correctly allow a tolerance of ± ½ small 2 square allow 2 correct bars for 1 mark allow bars touching allow any width of bars all bars correctly labelled ignore letters 1 02.8 as the level of infection (with allow as TMV increases, 1 AO3 TMV) increases, (the rate of) photosynthesis decreases 4.4.1.1 photosynthesis decreases allow (the rate of) photosynthesis decreases as the level of infection (with TMV) increases allow as infection gets worse, photosynthesis decreases allow TMV reduces photosynthesis 02.9 less chlorophyll allow fewer chloroplasts 1 AO2 allow less light absorbed 4.4.1.1 ignore less photosynthesis 4.4.1.3 4.3.1.2 (so) less glucose / starch / 1 protein made Total 14 10

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
02.7 y-axis labelled rate of 1 AO2
photosynthesis in arbitrary units 4.4.1.1
correct scale 1
all bars plotted correctly allow a tolerance of ± ½ small 2
square
allow 2 correct bars for 1 mark
allow bars touching
allow any width of bars
all bars correctly labelled ignore letters 1
02.8 as the level of infection (with allow as TMV increases, 1 AO3
TMV) increases, (the rate of) photosynthesis decreases 4.4.1.1
photosynthesis decreases
allow (the rate of)
photosynthesis decreases as
the level of infection (with TMV)
increases
allow as infection gets worse,
photosynthesis decreases
allow TMV reduces
photosynthesis
02.9 less chlorophyll allow fewer chloroplasts 1 AO2
allow less light absorbed 4.4.1.1
ignore less photosynthesis 4.4.1.3
4.3.1.2
(so) less glucose / starch / 1
protein made
Total 14
10

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 03.1 (has) spikes / thorns / prickles allow (has a) tough outer layer 1 AO2 4.3.3.2 03.2 chemical 1 AO1 4.3.3.2 03.3 the plant will not lose as much 1 AO2 water 4.2.3.2 03.4 chlorophyll / chloroplasts 1 AO2 4.1.1.2 03.5 to allow it to photosynthesise 1 AO2 or 4.4.1.1 to make sugar / glucose / carbohydrate / starch 03.6 organ 1 AO1 4.2.1 03.7 water / mineral ions allow named mineral ions 1 AO1 allow minerals / ions 4.2.3.1 4.2.3.2 03.8 phloem (tissue) 1 AO1 4.1.1.3 4.2.3.1 4.2.3.2 Total 8 11

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
03.1 (has) spikes / thorns / prickles allow (has a) tough outer layer 1 AO2
4.3.3.2
03.2 chemical 1 AO1
4.3.3.2
03.3 the plant will not lose as much 1 AO2
water 4.2.3.2
03.4 chlorophyll / chloroplasts 1 AO2
4.1.1.2
03.5 to allow it to photosynthesise 1 AO2
or 4.4.1.1
to make sugar / glucose /
carbohydrate / starch
03.6 organ 1 AO1
4.2.1
03.7 water / mineral ions allow named mineral ions 1 AO1
allow minerals / ions 4.2.3.1
4.2.3.2
03.8 phloem (tissue) 1 AO1
4.1.1.3
4.2.3.1
4.2.3.2
Total 8
11

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 04.1 C H O 1 AO1 6 12 6 4.4.1.1 4.4.2.1 04.2 carbohydrase 1 AO1 4.2.2.1 04.3 beaker allow water bath 1 AO1 4.2.2.1 RPA5 04.4 so that both solutions could 1 AO2 reach 10 °C 4.2.2.1 RPA5 04.5 10 / ten (minutes) 1 AO3 4.2.2.1 RPA5 04.6 test the mixture with iodine 1 AO3 solution every 30 seconds 4.2.2.1 RPA5 04.7 35 °C 1 AO3 4.2.2.1 RPA5 04.8 enzyme / amylase is denatured allow active site / enzyme has 1 AO2 or changed shape 4.2.2.1 enzyme / amylase stops working do not accept enzyme / RPA5 amylase has died (so) starch is not broken down 1 or starch is still present Total 9 12

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
04.1 C H O 1 AO1
6 12 6
4.4.1.1
4.4.2.1
04.2 carbohydrase 1 AO1
4.2.2.1
04.3 beaker allow water bath 1 AO1
4.2.2.1
RPA5
04.4 so that both solutions could 1 AO2
reach 10 °C 4.2.2.1
RPA5
04.5 10 / ten (minutes) 1 AO3
4.2.2.1
RPA5
04.6 test the mixture with iodine 1 AO3
solution every 30 seconds 4.2.2.1
RPA5
04.7 35 °C 1 AO3
4.2.2.1
RPA5
04.8 enzyme / amylase is denatured allow active site / enzyme has 1 AO2
or changed shape 4.2.2.1
enzyme / amylase stops working do not accept enzyme / RPA5
amylase has died
(so) starch is not broken down 1
or
starch is still present
Total 9
12

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 05.1 less blood flows through or less 1 AO1 blood flows to the heart (muscle 4.2.2.3 / cells / tissue) 4.2.2.4 allow less respiration 1 less oxygen (reaches the heart allow less energy released muscle) do not accept less energy produced / made / created 05.2 D 1 AO3 4.2.2.4 05.3 B 1 AO3 4.2.2.4 05.4 is more likely to get a blockage ignore has the highest blood 1 AO2 (with high cholesterol) cholesterol concentration 4.2.2.4 or blockage c ould be biggest 05.5 4 and 5.6 1 AO2 4.2.2.4 5.6 allow correct division using 1 � � = 1.4 either 5.3 or 5.8 (for person D) 4 05.6 opens / widens (artery) allow pushes blockage to the 1 AO1 side 4.2.2.4 so (more) blood can flow allow (more) oxygen(ated blood) 1 through can flow through 05.7 platelets 1 AO1 4.2.2.3 13

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
05.1 less blood flows through or less 1 AO1
blood flows to the heart (muscle 4.2.2.3
/ cells / tissue) 4.2.2.4
less oxygen (reaches the heart allow less respiration 1
muscle) allow less energy released
do not accept less energy
produced / made / created
05.2 D 1 AO3
4.2.2.4
05.3 B 1 AO3
4.2.2.4
05.4 is more likely to get a blockage ignore has the highest blood 1 AO2
(with high cholesterol) cholesterol concentration 4.2.2.4
or
blockage c ould be biggest
05.5 4 and 5.6 1 AO2
4.2.2.4
5.6 allow correct division using 1
� � = 1.4
4 either 5.3 or 5.8 (for person D)
05.6 opens / widens (artery) allow pushes blockage to the 1 AO1
side 4.2.2.4
so (more) blood can flow allow (more) oxygen(ated blood) 1
through can flow through
05.7 platelets 1 AO1
4.2.2.3
13

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 05.8 Level 2: A judgement, strongly linked and logically supported by a 3 ‒ 4 AO3 sufficient range of correct reasons, is given. 4.2.2.4 Level 1: Relevant points are made. They are not logically linked. 1 ‒ 2 No relevant content 0 Indicative content: Advantages: • only have to take the tablet once a day • only a tablet so easy to take or only a tablet so not painful to take • (drugs are effective so) less likely to get a blood clot • drugs are cheap so less cost to NHS or drugs are cheap so (more) people can afford them • drugs have been used for a long time so must be safe / trusted Disadvantages: • patients have to make sure they always have a supply of drugs • patients could forget to take the drugs (every day) • patients could still get a blood clot in the first week • restrictions on lifestyle because patients have to have a blood test every few weeks • restrictions on lifestyle because patient can’t eat certain foods • patients may get a blood clot if they eat the wrong food • risks associated with puncturing skin / infection • patient may have a fear of needles • higher risk of bleeding / bruising For Level 2 students must evaluate, including consideration of, the advantage and disadvantage of anti-clotting drugs. Total 14 14

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
05.8 Level 2: A judgement, strongly linked and logically supported by a 3 ‒ 4 AO3
sufficient range of correct reasons, is given. 4.2.2.4
Level 1: Relevant points are made. They are not logically linked. 1 ‒ 2
No relevant content 0
Indicative content:
Advantages:
• only have to take the tablet once a day
• only a tablet so easy to take or only a tablet so not painful to
take
• (drugs are effective so) less likely to get a blood clot
• drugs are cheap so less cost to NHS or drugs are cheap so
(more) people can afford them
• drugs have been used for a long time so must be safe / trusted
Disadvantages:
• patients have to make sure they always have a supply of drugs
• patients could forget to take the drugs (every day)
• patients could still get a blood clot in the first week
• restrictions on lifestyle because patients have to have a blood
test every few weeks
• restrictions on lifestyle because patient can’t eat certain foods
• patients may get a blood clot if they eat the wrong food
• risks associated with puncturing skin / infection
• patient may have a fear of needles
• higher risk of bleeding / bruising
For Level 2 students must evaluate, including consideration of, the
advantage and disadvantage of anti-clotting drugs.
Total 14
14

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 06.1 trachea 1 AO2 4.2.2.2 06. 2 any two from: 2 AO3 • only one air space (per 4.2.2.2 balloon) or alveoli not represented • blood vessels / capillaries not represented • bronchioles not represented do not accept bronchi not represented • glass tube not flexible (like trachea / bronchi) • bell jar does not move during breathing (like ribs) • ribs have gaps between them • rib cage contains muscles • pleural cavity not represented 06.3 any two from: 2 AO2 • speed (of treadmill) 4.4.2.2 • type of exercise or all were running • (biological) sex or all male • all were non-smokers • time spent running allow ran for 8 minutes ignore reference to time interval for counting breaths 06. 4 0 minutes = 20 1 AO2 8 minutes = 42 allow value for 8 minutes in the 4.4.2.2 range 41.5 to 42.5 ( 42 - 20 ) ÷ 20 × 100 allow correct substitution from 1 or incorrect graph readings (i.e. ±1 22 ÷ 20 × 100 small square) at 0 minutes and / or 8 minutes 110 (%) allow correct calculation from 1 incorrect graph readings from previous step 15

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
06.1 trachea 1 AO2
4.2.2.2
06. 2 any two from: 2 AO3
• only one air space (per 4.2.2.2
balloon)
or
alveoli not represented
• blood vessels / capillaries not
represented
• bronchioles not represented do not accept bronchi not
represented
• glass tube not flexible (like
trachea / bronchi)
• bell jar does not move during
breathing (like ribs)
• ribs have gaps between them
• rib cage contains muscles
• pleural cavity not represented
06.3 any two from: 2 AO2
• speed (of treadmill) 4.4.2.2
• type of exercise or all were
running
• (biological) sex or all male
• all were non-smokers
• time spent running allow ran for 8 minutes
ignore reference to time interval
for counting breaths
06. 4 0 minutes = 20 1 AO2
8 minutes = 42 allow value for 8 minutes in the 4.4.2.2
range 41.5 to 42.5
( 42 - 20 ) ÷ 20 × 100 allow correct substitution from 1
or incorrect graph readings (i.e. ±1
22 ÷ 20 × 100 small square) at 0 minutes and /
or 8 minutes
110 (%) allow correct calculation from 1
incorrect graph readings from
previous step
15

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 06. 5 to get more oxygen (into the allow using more oxygen (in 1 AO2 blood) muscles) 4.4.2.2 4.4.2.1 for use in respiration allow to reduce anaerobic 1 or for releasing energy (for respiration muscle contraction) do not accept produces / makes / creates energy or to remove more carbon dioxide (1) produced in respiration (1) 06.6 any one from: 1 AO3 • heart / pulse rate allow heart beat per minute 4.4.2.2 • depth / volume of breathing allow amount of sweat • volume of sweat • body temperature allow body mass / measurement 06. 7 any one from: 1 AO1 • (lung) cancer 4.2.2.6 • increased blood pressure allow named example of lung • lung disease disease e.g. asthma • low birth weight in babies of mothers who smoke • increased risk of heart / cardiovascular disease allow persistent cough ignore cough unqualified Total 12 16

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
06. 5 to get more oxygen (into the allow using more oxygen (in 1 AO2
blood) muscles) 4.4.2.2
4.4.2.1
for use in respiration allow to reduce anaerobic 1
or for releasing energy (for respiration
muscle contraction)
do not accept produces / makes
/ creates energy
or
to remove more carbon dioxide
(1)
produced in respiration (1)
06.6 any one from: 1 AO3
• heart / pulse rate allow heart beat per minute 4.4.2.2
• depth / volume of breathing
• volume of sweat allow amount of sweat
• body temperature
allow body mass / measurement
06. 7 any one from: 1 AO1
• (lung) cancer 4.2.2.6
• increased blood pressure
• lung disease allow named example of lung
disease e.g. asthma
• low birth weight in babies of
mothers who smoke
• increased risk of heart /
cardiovascular disease
allow persistent cough
ignore cough unqualified
Total 12
16

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 07.1 any two from: 2 AO1 • (microscope) slide 4.1.1.5 • cover slip RPA1 allow named dye / stain • dye / stain ignore water • (mounted) needle • pipette / dropper • scalpel ignore knife • forceps / tweezers allow swab (to collect cells) 07 .2 eyepiece / lens do not accept objective lens 1 AO1 4.1.1.5 RPA1 07 .3 to focus (the image / cells) allow to make the cells / image 1 AO1 clear(er) 4.1.1.5 RPA1 allow to improve resolution (of the image) ignore to move the stage up / down do not accept reference to magnification 0 7 .4 any one from: 1 AO3 • no cells in the field of view 4.1.1.5 • slide not in the correct RPA1 position allow light / microscope not • mirror not in correct position switched on / plugged in • (objective) lens not clicked into place or (objective) lens dirty • (student is) looking at a (large) air bubble • (the microscope is) not focussed allow student did not stain the cells allow idea of magnification not being high enough 17

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
07.1 any two from: 2 AO1
• (microscope) slide 4.1.1.5
• cover slip RPA1
• dye / stain allow named dye / stain
ignore water
• (mounted) needle
• pipette / dropper
• scalpel ignore knife
• forceps / tweezers
allow swab (to collect cells)
07 .2 eyepiece / lens do not accept objective lens 1 AO1
4.1.1.5
RPA1
07 .3 to focus (the image / cells) allow to make the cells / image 1 AO1
clear(er) 4.1.1.5
RPA1
allow to improve resolution (of
the image)
ignore to move the stage up /
down
do not accept reference to
magnification
0 7 .4 any one from: 1 AO3
• no cells in the field of view 4.1.1.5
• slide not in the correct RPA1
position
• mirror not in correct position allow light / microscope not
switched on / plugged in
• (objective) lens not clicked
into place
or
(objective) lens dirty
• (student is) looking at a
(large) air bubble
• (the microscope is) not
focussed
allow student did not stain the
cells
allow idea of magnification not
being high enough
17

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 0 7 .5 Level 2: Scientifically relevant features are identified; the way(s) in 4 ‒ 6 AO2 which they are similar/different is made clear and (where appropriate) the magnitude of the similarity/difference is noted. Level 1: Relevant features are identified and differences noted. 1 ‒ 3 AO1 No relevant content 0 Indicative Content 4.1.1.2 4.2.2.3 Differences: • red blood cell has no nucleus or plant cell has a nucleus • red blood cell has no cell wall or plant cell has a cell wall • red blood cell is a biconcave disc or there are many different shapes of plant cell • red blood cell contains haemoglobin or plant cells do not contain haemoglobin • red blood cells do not contain chlorophyll or plant cells (may) contain chlorophyll • red blood cell has no chloroplasts or plant cell has chloroplasts • red blood cell has no (permanent) vacuole or plant cell has (permanent) vacuole • red blood cells are (much) smaller than plant cells Similarities: both have: • cytoplasm • cell membrane • pigments (although they are different) ignore references to mitochondria and ribosomes for Level 2 , consideration of both red blood cells and plant cells is required. 07 .6 water enters (the cells) by allow water enters and the cell 1 AO2 osmosis / diffusion starts to swell ignore explanations of osmosis plant cell has a cell wall (which allow red blood cell has no cell 1 AO1 prevents it from bursting) wall (so it swells and bursts) 4.1.3.2 4.1.1.2 Total 13 18

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
0 7 .5 Level 2: Scientifically relevant features are identified; the way(s) in 4 ‒ 6 AO2
which they are similar/different is made clear and (where
appropriate) the magnitude of the similarity/difference is noted.
Level 1: Relevant features are identified and differences noted. 1 ‒ 3 AO1
No relevant content 0
Indicative Content 4.1.1.2
4.2.2.3
Differences:
• red blood cell has no nucleus or plant cell has a nucleus
• red blood cell has no cell wall or plant cell has a cell wall
• red blood cell is a biconcave disc or there are many different
shapes of plant cell
• red blood cell contains haemoglobin or plant cells do not contain
haemoglobin
• red blood cells do not contain chlorophyll or plant cells (may)
contain chlorophyll
• red blood cell has no chloroplasts or plant cell has chloroplasts
• red blood cell has no (permanent) vacuole or plant cell has
(permanent) vacuole
• red blood cells are (much) smaller than plant cells
Similarities:
both have:
• cytoplasm
• cell membrane
• pigments (although they are different)
ignore references to mitochondria and ribosomes
for Level 2 , consideration of both red blood cells and plant cells is
required.
07 .6 water enters (the cells) by allow water enters and the cell 1 AO2
osmosis / diffusion starts to swell
ignore explanations of osmosis
plant cell has a cell wall (which allow red blood cell has no cell 1 AO1
prevents it from bursting) wall (so it swells and bursts)
4.1.3.2
4.1.1.2
Total 13
18

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 08.1 ignore ‘clean’ unqualified AO1 any two from: ignore wash hands 2 4.1.1.6 • sterilise equipment / surfaces allow description of how to RPA2 (before use) sterilise equipment • (use) sterilised agar allow description of how to sterilise agar • secure lid of the Petri dish with (adhesive) tape • only lift lid of Petri dish a little (when setting up plate) or lift lid of Petri dish at an angle (when setting up plate) 08 .2 B 1 AO3 4.1.1.6 and RPA2 it kills the fewest bacteria or it has the smallest area where allow it has the smallest clear / no bacteria were growing white area 19

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
08.1 ignore ‘clean’ unqualified AO1
any two from: ignore wash hands 2 4.1.1.6
• sterilise equipment / surfaces allow description of how to RPA2
(before use) sterilise equipment
• (use) sterilised agar allow description of how to
sterilise agar
• secure lid of the Petri dish
with (adhesive) tape
• only lift lid of Petri dish a little
(when setting up plate)
or lift lid of Petri dish at an
angle (when setting up plate)
08 .2 B 1 AO3
4.1.1.6
and RPA2
it kills the fewest bacteria
or
it has the smallest area where allow it has the smallest clear /
no bacteria were growing white area
19

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 08 .3 an incorrect answer for one step AO2 does not prevent allocation of 4.1.1.6 marks for subsequent steps RPA 2 ignore calculation and subtraction of filter paper disc area from total area (correct measurement) 1 r = 1.1 (cm) allow d = 2.2 (cm) or or r = 11 (mm) d = 22 (mm) allow a tolerance of ±1 mm (recall of the equation) 1 𝜋𝜋 r 2 (calculation/substitution) 3.14 x 1.1 2 allow correct calculation / 1 or substitution using an incorrect 3.14 x 11 2 measurement = 3.799(4) (from 3.14 x 1.1 2 ) allow 3.8 1 or = 379.9(4) (from 3.14 x 11 2 ) allow 380 correct unit (3.7994) cm 2 do not accept unit with no 1 or attempt at working / answer (379.94) mm 2 08 .4 any one from: 1 AO3 • repeat and calculate a mean 4.1.1.6 • repeat and eliminate RPA2 anomalies • use a control disc allow description of control disc e.g. disc with water / nothing ignore set up a control • use different types of bacteria Total 9 20

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
08 .3 an incorrect answer for one step AO2
does not prevent allocation of 4.1.1.6
marks for subsequent steps RPA 2
ignore calculation and
subtraction of filter paper disc
area from total area
(correct measurement) 1
r = 1.1 (cm) allow d = 2.2 (cm)
or or
r = 11 (mm) d = 22 (mm)
allow a tolerance of ±1 mm
(recall of the equation) 1
𝜋𝜋 r 2
(calculation/substitution)
3.14 x 1.1 2 allow correct calculation / 1
or substitution using an incorrect
3.14 x 11 2 measurement
= 3.799(4) (from 3.14 x 1.1 2 ) allow 3.8 1
or
= 379.9(4) (from 3.14 x 11 2 ) allow 380
correct unit
(3.7994) cm 2 do not accept unit with no 1
or attempt at working / answer
(379.94) mm 2
08 .4 any one from: 1 AO3
• repeat and calculate a mean 4.1.1.6
• repeat and eliminate RPA2
anomalies
• use a control disc allow description of control disc
e.g. disc with water / nothing
ignore set up a control
• use different types of bacteria
Total 9
20

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 AO / Question Answers Extra information Mark Spec. Ref. 09.1 normal 1 AO2 4.2.2.5 4.2.2.6 09 .2 92 ÷ 1.71 2 1 AO2 4.2.2.5 31.46(…) allow correctly calculated value 1 4.2.2.6 using 92 ÷ 1.71 31.5 1 0 9 .3 any two from: allow ‘more overweight’ or ‘more 2 AO2 obese’ for higher BMI category 4.2.2.5 throughout 4.2.2.6 • the higher the BMI (category) allow the lower the BMI the lower the number of years (category) the higher the living in good health number of years living in good health • the higher the BMI (category) allow the lower the BMI the higher the number of (category) the lower the number years living in bad health of years living in bad health • the higher the BMI (category), allow the lower the BMI the lower total life expectancy (category), the higher total life expectancy if no other marks awarded, allow for 1 mark idea that as BMI increases, quality of life decreases 21

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
AO /
Question Answers Extra information Mark
Spec. Ref.
09.1 normal 1 AO2
4.2.2.5
4.2.2.6
09 .2 92 ÷ 1.71 2 1 AO2
4.2.2.5
31.46(…) allow correctly calculated value 1 4.2.2.6
using 92 ÷ 1.71
31.5 1
0 9 .3 any two from: allow ‘more overweight’ or ‘more 2 AO2
obese’ for higher BMI category 4.2.2.5
throughout 4.2.2.6
• the higher the BMI (category) allow the lower the BMI
the lower the number of years (category) the higher the
living in good health number of years living in good
health
• the higher the BMI (category) allow the lower the BMI
the higher the number of (category) the lower the number
years living in bad health of years living in bad health
• the higher the BMI (category), allow the lower the BMI
the lower total life expectancy (category), the higher total life
expectancy
if no other marks awarded, allow
for 1 mark idea that as BMI
increases, quality of life
decreases
21

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 09 .4 costs the NHS / UK health 1 AO3 service / Government / hospitals 4.2.2.6 more money (because need to pay for) allow other correct named 1 additional surgery / medication / conditions e.g. heart attack / hospital stay to treat stroke / immobility / disability / arthritis diabetes or more time off work (if in hospital allow more people unable to / unwell) (1) work (so) employer / Government allow (so) decreased have to give financial support (1) productivity (in workplace) 0 9 .5 allow any one from: 1 AO3 • movement issues allow example of movement 4.2.2.6 issue • loss of job / income • disability • mental health impact of lack of movement or mental health impact of pain • need to visit the doctor / take medication regularly • may need surgery 09 .6 type 2 diabetes 1 AO1 4.2.2.4 CVD / CHD allow atherosclerosis 1 4.2.2.6 or heart attack / disease or stroke allow two named vascular conditions for 2 marks from heart attack or stroke or high blood pressure or high (blood) cholesterol allow cancer allow liver disease Total 11 22

MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021
09 .4 costs the NHS / UK health 1 AO3
service / Government / hospitals 4.2.2.6
more money
(because need to pay for) allow other correct named 1
additional surgery / medication / conditions e.g. heart attack /
hospital stay to treat stroke / immobility / disability / arthritis
diabetes
or
more time off work (if in hospital allow more people unable to
/ unwell) (1) work
(so) employer / Government allow (so) decreased
have to give financial support (1) productivity (in workplace)
0 9 .5 allow any one from: 1 AO3
• movement issues allow example of movement 4.2.2.6
issue
• loss of job / income
• disability
• mental health impact of lack
of movement
or
mental health impact of pain
• need to visit the doctor / take
medication regularly
• may need surgery
09 .6 type 2 diabetes 1 AO1
4.2.2.4
CVD / CHD allow atherosclerosis 1 4.2.2.6
or
heart attack / disease
or
stroke
allow two named vascular
conditions for 2 marks from
heart attack or stroke or high
blood pressure or high (blood)
cholesterol
allow cancer
allow liver disease
Total 11
22

June 2021 MS