Question

Which statement is wrong for Krebs' cycle?

(a) There are three points in the cycle where NAD⁺ is reduced to NADH + H⁺ 

(b) There is one point in the cycle where FAD⁺ is reduced to FADH₂ 

(c) During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesised 

(d) The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid 

Answer 1

Correct option (d) The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid 

Explanation :

Option (d) is incorrect, which can be corrected as Krebs' cycle starts with the condensation of acetyle group with oxaloacetic acid and water yeild citric acid.

During conversion of succinic acid fumaric acid FAD⁺ Is reduced to FADH₂. During conversion of pyruvic acid to acetyl Co- A, isocitrate to oxalosuccinic acid and α-ketoglutaric acid to succinly Co-ANAD⁺ is reduced to NADPH + H⁺