AQA-BL2HP-QP-JUN12 - Centre Number For Examiners Use Candidate Number Surname Other Names Examiners Initials Candidate Signature Question General

AQA-BL2HP-QP-JUN12 - Centre Number For Examiners Use...

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General Certificate of Secondary Education Higher Tier June 2012 Additional Science BL2HP Unit Biology B2 Biology Unit Biology B2 Monday 21 May 2012 9.00 am to 10.00 am For this paper you must have: a ruler. You may use a calculator. Time allowed 1 hour Instructions Use black ink or black ball-point pen. Fill in the boxes at the top of this page. Answer all questions. You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. Do all rough work in this book. Cross through any work you do not want to be marked. Information The marks for questions are shown in brackets. The maximum mark for this paper is 60. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. Question 3(b) should be answered in continuous prose. In this question you will be marked on your ability to: – use good English – organise information clearly – use specialist vocabulary where appropriate. Advice In all calculations, show clearly how you work out your answer. BL2HP H (JUn12BL2Hp01) G/K83213 6/6/6/6 Centre Number Candidate Number Surname Other Names Candidate Signature For Examiner’s Use Examiner’s Initials Question Mark 1 2 3 4 5 6 7 TOTAL
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2 Do not write outside the box (02) G/K83213/Jun12/BL2HP Answer all questions in the spaces provided. 1 Glycogen is stored in the muscles. Scientists investigated changes in the amount of glycogen stored in the muscles of two 20 year-old male athletes, A and B . Athlete A ate a high-carbohydrate diet. Athlete B ate a low-carbohydrate diet. Each athlete did one 2-hour training session each day. The graph shows the results for the first 3 days. 0 0 12 24 Time in hours Athlete A Athlete B 36 48 60 72 20 40 60 80 100 Concentration of glycogen in muscles in mmol per kilogram of muscle mass 120 Training session Key: 1 (a) (i) Give three variables that the scientists controlled in this investigation. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks)
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3 Do not write outside the box (03) G/K83213/Jun12/BL2HP Turn over 1 (a) (ii) Suggest two variables that would be difficult to control in this investigation. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) 1 (a) (iii) Describe one way in which the results of Athlete B were different from the results of Athlete A . ............................................................................................................................................ ............................................................................................................................................ (1 mark) 1 (b) Both athletes were training to run a marathon. Which athlete, A or B , would be more likely to complete the marathon? Use information from the graph to explain your answer. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (4 marks) ____ 10 Turn over for the next question
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4 Do not write outside the box (04) G/K83213/Jun12/BL2HP 2 The diagram shows two cells, a bacterial cell and a plant cell.
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