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IB Biology HL C1.1.14 Hl Allosteric Sites and Non Competitive Inhibition Questions

Learn how non-competitive inhibitors bind at allosteric sites, change enzyme shape and reduce activity despite substrate presence in IB Biology HL C1.1.14.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Define an allosteric site as a site separate from the active site and locate non-competitive inhibitor binding there.
  • Explain that non-competitive binding changes enzyme shape, reduces active-site function and lowers activity despite substrate presence.
  • Distinguish non-competitive from competitive inhibition using binding site and substrate-response evidence.

IB Biology HL C1.1.14 Hl Allosteric Sites and Non Competitive Inhibition Questions question 1

[Maximum number: 1]

The dashed line shows the relationship between the activity of an enzyme and the concentration of its substrate. Which curve shows the effect of a non-competitive inhibitor on this relationship?

Figure for Question IB Biology HL C1.1.14 Hl Allosteric Sites and Non Competitive Inhibition Questions question 1 — IB Biology HL
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