DP Biology (first assessment 2025)

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Question 23M.1A.HL.TZ1.30

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.HL.TZ1.30
Level HL Paper 1A Time zone TZ1
Command term Question number 30 Adapted from N/A
30.
[Maximum mark: 1]
23M.1A.HL.TZ1.30

The cycle shows part of the light-independent reactions in photosynthesis.

What occurs in Step 1?

A.  ATP is formed for Step 2.

B.  Rubisco catalyses the hydrolysis of ribulose bisphosphate.

C.  A carboxylase catalyses the carboxylation of ribulose bisphosphate.

D.  NADP is converted to reduced NADP.

[1]

Markscheme

C

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