Question

Krebs cycle is

• A. Oxidation of glucose to alcohol and water
• B. Oxidation of acetyl CoA to carbon dioxide and water involving electron transport
• C. Complete oxidation of acetyl CoA without electron transport
• D. Complete reduction of acetyl CoA to carbon doxide and water.

Answer 1

Answer: (C)

Complete oxidation of acetyl CoA without electron transport

The hydroxyethyl group of pyruvate is oxidized to an acetyl group and the enzyme-bound acetyl group is transferred to CoA forming acetyl CoA. During the Krebs cycle, electrons are removed from acetyl CoA and these electrons reduce more NAD+, along with another electron carrier, FAD.

So the correct option is 'Complete oxidation of acetyl CoA without electron transport'.