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

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

AIPMTAIPMT 1990Respiration in Plants

Solution:

The end product of glycolysis is a three-carbon molecule pyruvic acid. Pyruvic acid is first converted to acetyl coenzyme A by a link reaction. This acetyl coenzyme A is a two-carbon molecule. This reaction results in the decarboxylation of the pyruvic acid. The acetyl coenzyme A thus formed enters the Krebs cycle and along with oxaloacetic acid forms a 6 C molecule citric acid.