DP Biology (first assessment 2025)

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Question 22M.1A.HL.TZ1.29

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.HL.TZ1.29
Level HL Paper 1A Time zone TZ1
Command term Question number 29 Adapted from N/A
29.
[Maximum mark: 1]
22M.1A.HL.TZ1.29

The graph shows the effect of increasing substrate concentration on the rate of an enzyme-catalysed reaction.

 

Which type of inhibition corresponds to the labelled curves?

 

[1]

Markscheme

B

Examiners report

This was another relatively hard question with a low discrimination index. Surprisingly, some of the stronger candidates seem to have muddled up the effect of substrate concentration on competitive and non-competitive inhibitors.

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