Metabolic Regulation of Pathways · Zoology

Feedback inhibition occurs when:

  1. A substrate molecule directly inhibits the enzyme
  2. The end product inhibits an early enzyme
  3. An enzyme inhibits itself
  4. Hormones block enzyme synthesis
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Correct answer: The end product inhibits an early enzyme

In feedback inhibition, the end product of a pathway inhibits an enzyme earlier in the pathway. This prevents overproduction.

Difficulty: Medium Question 18 of 20

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