Question

your liver produces 90% of the cholesterol found in your body. when cholesterol levels get too high, the first enzyme in the pathway of cholesterol synthesis is inhibited. this is an example of positive feedback. denaturation. equilibrium. negative feedback. a coenzyme.

Explanation:

To solve this, we analyze each option:

• Positive feedback amplifies a process, but here the enzyme is inhibited to reduce cholesterol synthesis, so not positive feedback.
• Denaturation refers to protein structure change, not related to this regulatory process.
• Equilibrium is a state of balance, not the mechanism here.
• Negative feedback occurs when a system's output inhibits its own production to maintain stability. High cholesterol inhibiting its synthesis enzyme fits this (inhibition reduces further cholesterol production).
• A coenzyme is a non - protein helper for enzymes, not relevant here.

Answer:

D. negative feedback.