AQA A-Level Biology 2025/6

Biology • A-Level

Question 1 of 40

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Which structural feature of the mitochondrion most directly increases the surface area available for the enzymes of the electron transport chain?

Hint: Consider where the proteins of oxidative phosphorylation are embedded.

The circular mitochondrial DNA located in the matrix The extensive folding of the inner membrane into cristae The presence of a double phospholipid outer membrane The large intermembrane space between the inner and outer membranes

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