Botany-TCA Cycle
NEET Botany TCA Cycle MCQ Question
Type: MCQ-diagram based-Hard-Class 11
A diagram of the TCA cycle is shown, with several intermediates and cofactors labeled as A, B, C, and D. If intermediate B represents the point where NAD+ is reduced to NADH + H+, which of the following correctly identifies this intermediate?
A
Isocitrate
B
α-Ketoglutarate
C
Succinyl-CoA
D
Succinate
Correct Answer
Option A
Detailed Explanation
In the TCA cycle, isocitrate is oxidized to α-ketoglutarate, during which NAD+ is reduced to NADH + H+. This is one of the three points in the cycle where NAD+ is reduced.
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