DP Biology (first assessment 2025)

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Question 23M.1A.HL.TZ1.40

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.HL.TZ1.40
Level HL Paper 1A Time zone TZ1
Command term Question number 40 Adapted from N/A
40.
[Maximum mark: 1]
23M.1A.HL.TZ1.40

What happens in the acrosome reaction?

A.  Enzymes digest the zona pellucida around an ovum, allowing a sperm to enter.

B.  Enzymes digest the binding proteins of the zona pellucida so that no more sperm enter.

C.  Acrosomes release binding proteins to the zona pellucida for sperm entrance.

D.  Acrosomes react with the cortical granules to allow fertilization.

[1]

Markscheme

A

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