Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

What effect does oxygen availability have on mitochondrial respiration?
Options
A No impact
B Acts as the final electron acceptor; low levels reduce ATP production
Correct Answer
C Stops glycolysis
D Increases lactic acid production directly
Correct Answer

Option B is the correct answer.

Detailed Explanation

Oxygen is the final electron acceptor in the electron transport chain. Without it, the chain backs up, NADH and FADH2 cannot be re-oxidized, the proton gradient collapses, and oxidative phosphorylation stops, drastically reducing ATP yield.

Hint

It's essential for the last step of aerobic respiration.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 802 of 2556
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