Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

How do mitochondria contribute to thermogenesis in brown fat cells?
Options
A By storing heat
B Through uncoupling protein (UCP1), which dissipates proton gradient to release heat
Correct Answer
C Via ATP hydrolysis
D Using glucose as insulation
Correct Answer

Option B is the correct answer.

Detailed Explanation

Brown adipose tissue mitochondria contain uncoupling protein 1 (UCP1 or thermogenin). It creates a proton leak across the inner membrane, allowing protons to bypass ATP synthase. This uncouples fuel oxidation from ATP production, releasing energy as heat.

Hint

They deliberately waste the proton gradient to generate warmth.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 807 of 2556
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