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  •  Which statement is wrong for Krebs' cycle?  <div class='qn

 Which statement is wrong for Krebs' cycle?

 

Option: 1

There are three points in the cycle where NAD^{+} is reduced to NADH^{+}H^{+}

 


Option: 2

There is one point in the cycle where FAD^{+} is reduced to FADH_{2}

 


Option: 3

During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesized

 


Option: 4

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

 


Answers (1)

best_answer

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

During conversion of succinic acid to fumaric acid FAD^{+} is reduced to FADH. During conversion of pyruvic acid to acetyl Co - A, isocitrate to oxalosuccinic acid and a ketoglutaric acid to succinyl Co-A\:\: \: NAD^{+} is reduced to NADH^{+}H^{+}.

Hence, the correct answer is option 4. 

 

Posted by

Ritika Kankaria

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