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Date November 2020 Marks available 1 Reference code 20N.1.HL.TZ0.29
Level Higher level Paper Paper 1 Time zone TZ0 / no time zone
Command term Question number 29 Adapted from N/A

Question

Sulfanilamide inhibits an enzyme that catalyses a reaction involving PABA, an intermediate in the synthesis of folate in bacteria. The structures of sulfanilamide and PABA are shown.

The graph shows the rate of reaction with increasing substrate concentration and with fixed low concentration of different types of inhibitors. Which line on the graph represents the effect of sulfanilamide?

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Additional higher level » Topic 8: Metabolism, cell respiration and photosynthesis » 8.1 Metabolism
Additional higher level » Topic 8: Metabolism, cell respiration and photosynthesis
Additional higher level

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