June 2018 QP_2

PMT PMT Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature H GCSE BIOLOGY Higher Tier Paper 1H Tuesday 15 May 2018 Afternoon Time allowed: 1 hour 45 minutes Materials For Examiner’s Use For this paper you must have: Question Mark • a ruler 1 • a scientific calculator. 2 Instructions 3 • Use black ink or black ball-point pen. 4 • Fill in the boxes at the top of this page. 5 • Answer all questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want 6 to be marked. 7 • In all calculations, show clearly how you work out your answer. TOTAL Information • There are 100 marks available on this paper. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. * JUN18 84611H01 * 8461/1H IB/M/Jun18/E8

PMT PMT Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature H GCSE BIOLOGY Higher Tier Paper 1H Tuesday 15 May 2018 Afternoon Time allowed: 1 hour 45 minutes Materials For Examiner’s Use For this paper you must have: Question Mark • a ruler 1 • a scientific calculator. 2 Instructions 3 • Use black ink or black ball-point pen. 4 • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. 5 • Do all rough work in this book. Cross through any work you do not want 6 to be marked. 7 • In all calculations, show clearly how you work out your answer. TOTAL Information • There are 100 marks available on this paper. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. * JUN18 84611H01 * 8461/1H IB/M/Jun18/E8

PMT PMT 2 Do not write outside the box There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED * 02 * IB/M/Jun18/8461/1H

PMT PMT 2 Do not write outside the box There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED * 02 * IB/M/Jun18/8461/1H

PMT PMT 3 Do not write outside the 0 1 Eating food containing Salmonella bacteria can cause illness. box 0 1 . 1 Two symptoms of infection by Salmonella are vomiting and diarrhoea. What causes these symptoms? [1 mark] 0 1 . 2 Give two ways a person with a mild infection of Salmonella can help prevent the spread of the bacteria to other people. [2 marks] 1 2 0 1 . 3 In very serious infections of Salmonella , a doctor can prescribe drugs to kill the bacteria. What type of drug can the doctor prescribe to kill the bacteria? [1 mark] 0 1 . 4 A person with AIDS may take longer than a healthy person to recover from a Salmonella infection. Explain why. [2 marks] Turn over ► * 03 * IB/M/Jun18/8461/1H

PMT PMT 3 Do not write outside the 0 1 Eating food containing Salmonella bacteria can cause illness. box 0 1 . 1 Two symptoms of infection by Salmonella are vomiting and diarrhoea. What causes these symptoms? [1 mark] 0 1 . 2 Give two ways a person with a mild infection of Salmonella can help prevent the spread of the bacteria to other people. [2 marks] 1 2 0 1 . 3 In very serious infections of Salmonella , a doctor can prescribe drugs to kill the bacteria. What type of drug can the doctor prescribe to kill the bacteria? [1 mark] 0 1 . 4 A person with AIDS may take longer than a healthy person to recover from a Salmonella infection. Explain why. [2 marks] Turn over ► * 03 * IB/M/Jun18/8461/1H