NEET Botany Electron Transport Chain MCQ Question
Which of the following statements about the electron transport chain (ETC) in respiration is correct?
NADH is oxidised by NADH dehydrogenase, transferring electrons to ubiquinone.
FADH2 directly donates electrons to oxygen in the ETC.
Cytochrome c is the first electron carrier in the electron transport chain.
Ubiquinone is reduced to ubiquinol by receiving electrons from cytochrome c.
Correct Answer
Detailed Explanation
In the electron transport chain, NADH is indeed oxidised by NADH dehydrogenase (complex I), and electrons are transferred to ubiquinone. FADH2 is oxidised through complex II, not directly to oxygen. Cytochrome c is not the first carrier; it acts later in the chain. Ubiquinone is reduced to ubiquinol before transferring electrons to cytochrome c, not the other way around.
Found an issue with this question?