Question

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

• A. Oxaloacetate
• B. PEP
• C. Pyruvate
• D. Acetyl CoA

Answer 1

The correct option is D Acetyl CoA

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.

So, the correct option is acetyl 'Acetyl CoA.'