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Examen
Stuvia-1444431-aqa-a-level-biology-paper-1-2020-question-paperverified-questions-2020.pdf
S 
 
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] 
. The movement of Na+ out of the cell allows the absorption of glucose into the ...
Examen
Aqa A-Level Biology Paper 1 2020 Question Paper(Verified Questions 2020-2023 Latest Update
PopularAqa A-Level Biology Paper 1 2020 Question Paper(Verified Questions 2020-2023 Latest Update