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Question

An amphibolic pathway is

A
TCA cycle
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B
Calvin cycle
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C
Terminal oxidation
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D
Electron transport chain
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Solution

The correct option is A TCA cycle
Kreb's cycle consists of 8 cyclic steps which take place in the mitochondrial matrix. Each step is catalyzed by a specific enzyme. In Kreb's cycle, the entrant molecule is 2- carbon acetyl coenzyme A and the receptor molecule is 4- carbon oxaloacetate. Since the process involves both catabolic and anabolic reactions. it is an amphibolic pathway. It degrades acetyl coenzyme A and yields carbon dioxide and energy which is used to produce NADH, H+, and FADH+
Thus, the correct answer is option A.

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