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Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to

1. oxaloacetate
2. PEP
3. pyruvate
4. acetyl CoA

Correct answer: acetyl CoA

Solution

Pyruvate from glycolysis is converted in the link reaction to acetyl CoA, which then combines with oxaloacetate to start the Krebs cycle. This makes acetyl CoA the connecting link between glycolysis and the citric acid cycle.

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