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Question

Formation of acetyl CoA in the process of respiration constitutes the

A
last step of glycolysis
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B
link between glycolysis and fermentation
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C
link between glycolysis and Kreb’s cycle
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D
first step of Kreb’s cycle
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Solution

The correct option is C link between glycolysis and Kreb’s cycle
Formation of acetyl CoA is the link between glycolysis and Kreb’s cycle.

The last step of glycolysis is the formation of pyruvate from phosphoenolpyruvate. Hence formation of acetyl coA is not the last step of glycolysis.

During fermentation, pyruvate formed in glycolysis, is converted to alcohol or lactic acid, therefore acetyl CoA is not the link between glycolysis and fermentation.

Acetyl CoA is not the first step of Kreb's cycle.
Acetyl CoA is a molecule that is further converted to oxaloacetate, which enters the cycle.

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