DP Biology (first assessment 2025)

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Question 21M.1A.HL.TZ1.21

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

Which process results in the exchange of gases across the membrane of pneumocytes?

A. Active transport

B. Simple diffusion

C. Facilitated diffusion

D. Mass flow

[1]

Markscheme

B

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