AQA A LEVEL BIOLOGY PAPER 1 2020 QUESTION PAPER

AQA

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aqa-a-level-biology-paper-1-2020-question-paper

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aqa-a-level-biology-paper-1-2020-question-paper
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37

juni 2023

2022/2023

A+
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 . 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]
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AQA A LEVEL BIOLOGY PAPER 1 2020 QUESTION PAPER

AQA

aqa-a-level-biology-paper-1-2020-question-paper