DP Biology (first assessment 2025)

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Question 23M.1A.SL.TZ1.21

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ1.21
Level SL Paper 1A Time zone TZ1
Command term Question number 21 Adapted from N/A
21.
[Maximum mark: 1]
23M.1A.SL.TZ1.21

What happens during blood clotting?

A.  A chain reaction causes platelets to release antibodies to avoid infections.

B.  Thrombin is converted into fibrinogen after a series of chemical reactions.

C.  Sealing of wounds by fibrinogen makes platelets release antibodies for clotting.

D.  Chemical reactions cause wounds to seal after platelets release clotting factors.

[1]

Markscheme

D

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