AQA_A-LEVEL_BIOLOGY_PAPER_1_2020_QUESTION_PAPER

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AQA A-LEVEL BIOLOGYPAPER 1
2020QUESTIONPAPER(VERIFIED
QUESTIONS 2020)

AQAALEVELBIOLOGYPAPER 12020 QP




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Please write clearly in block capitals.


Centre number Candidate number



Surname Forename(s)
Candidate signature


I declare this is my own work.



A-level
BIOLOGY
Paper1


Thursday4June2020 Morning Timeallowed:2hours
Materials For iExaminer’s
For this paper you must have: iUse


 a ruler with millimetre measurements Question Mark
 a scientific calculator. 1
2
Instructions
3
 Use black ink or black ball-point pen.
 Fill in the boxes at the top of this page. 4
 Answer all questions. 5
 You must answer the questions in the spaces provided. Do 6
not write outside the box around each page or on blank
7
pages.
 If you need extra space for your answer(s), use the lined pages 8
at the end of this book. Write the question number against your 9
answer(s).
10
 Show all your working.
 Do all rough work in this book. Cross through any work you TOTAL
do not want to be marked.

Information
 The marks for the questions are shown in brackets.
 The maximum mark for this paper is 91.




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2
Do not write
outside the
Answer all questions in the spaces box
provided.


0 1 Figure 1 shows a cell from the lining of the ileum specialised for
absorption of products of digestion.

SGLT1 is a carrier protein found in the cell-surface membrane of this cell,
it transports glucose and sodium ions (Na+) into the cell.

Figure 1




0 1 . 1 The action of the carrier protein X in Figure 1 is linked to a membrane-
bound ATP hydrolase enzyme.

Explain the function of this ATP hydrolase.
[2 marks]




0 1 . 2 The movement of Na+ out of the cell allows the absorption of
glucose into the cell lining the ileum.

Explain how.
[2 marks]




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outside the
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0 1 i. i 3 Describe and explain two features you would expect to find in a cell
specialised for absorption.
[2 marks]

1




2




Question 1 continues on the next page




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