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The enzyme that serves as the connecting link between glycolysis and Krebs cycle is ______

(a) phosphoenolpyruvic acid

(b) glyceraldehyde

(c) acetyl CoA

(d) isomerase

This question was posed to me by my college director while I was bunking the class.

Question is from Plants Respiration topic in portion Respiration in Plants of Biology – Class 11

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Correct option is (c) acetyl CoA

Best explanation: Acetyl CoA or activated acetate is formed as a result of the combination of pyruvate with Sulphur containing coenzyme A. This step is also called gateway step or link reaction as it connects the two main processes of respiration namely glycolysis and Krebs cycle.

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