DP Biology (first assessment 2025)

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Question 21N.1A.HL.TZ1.30

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1A.HL.TZ1.30
Level HL Paper 1A Time zone TZ1
Command term Question number 30 Adapted from N/A
30.
[Maximum mark: 1]
21N.1A.HL.TZ1.30

Where are protons pumped, to allow chemiosmosis in aerobic respiration to occur?

A. From outside the mitochondrion through the double membranes

B. From carrier to carrier in the inner mitochondrial membrane

C. From the matrix of the mitochondrion to the space between the membranes

D. From the space between the membranes to the cytoplasm outside the mitochondrion

[1]

Markscheme

C

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