DP Biology (first assessment 2025)

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Question 21N.1A.SL.TZ0.3

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1A.SL.TZ0.3
Level SL Paper 1A Time zone TZ0
Command term Question number 3 Adapted from N/A
3.
[Maximum mark: 1]
21N.1A.SL.TZ0.3

How is facilitated diffusion in axons similar to active transport?

A. They both require the energy of ATP.

B. They both move substances against a concentration gradient.

C. They both use sodium–potassium pumps.

D. They are both carried out by proteins embedded in the axon membrane.

[1]

Markscheme

D

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