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AQA A LEVEL BIOLOGY PAPER 1 2020 QP - Copy £8.72   Add to cart

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AQA A LEVEL BIOLOGY PAPER 1 2020 QP - Copy

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AQA A LEVEL BIOLOGY PAPER 1 2020 QP - Copy

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  • May 17, 2024
  • 41
  • 2023/2024
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Docwinnie
A-level
BIOLOGY
Paper 1 June
2020




*JUN207402101
* IB/M/Jun20/ 7402/1
E16

, Please write clearly in block capitals.

A-level
Centre Candidate

BIOLOGY
number number


Paper1
Surname

Forename(s)

Candidate ure
Thursday
signat 4 June 2020 Morning Timeallowed:2hours
Materials For IExaminer’s
For this paper you must have: IUse

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

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




*JUN207402101
* IB/M/Jun20/ 7402/1
E16

, 2
Do not
Answer all questions in the spaces writeout
box
provided.


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

SGLT1 is a carrier protein found in the cell-surface membrane of
this cell, it transportsgI lucose 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 ATPhydrolase enzyme.

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




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

Explain how.
[2 marks]




*02
IB/M/

, 3
Do
not
e the box
0 1 . I3 Describe and explain two features you would expect to find in a cell
specialised forabsorption.
[2 marks]

1




2




Question 1 continues on the next page




Turn over ►


*03
IB/M/

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