CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Reduction
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Oxidation
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Decarboxylation
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Addition of Coenzyme A
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Detailed explanation-1: -After pyruvate is produced from glycolysis, it enters the mitochondria to begin aerobic respiration. Aerobic respiration begins with the conversion of pyruvate to acetyl CoA. This conversion takes place in three steps: decarboxylation, the reduction of NAD+, and the attachment of coenzyme A.
Detailed explanation-2: -This reaction is common in most organisms as a link between glycolysis and the citric acid cycle. So, the process used in conversion of pyruvate to acetyl CoA is oxidative decarboxylation.
Detailed explanation-3: -Therefore the answer option ‘Transamination’ is correct.
Detailed explanation-4: -A carboxyl group is removed from pyruvate and released as carbon dioxide. The two-carbon molecule from the first step is oxidized, and NAD+ accepts the electrons to form NADH. The oxidized two-carbon molecule, an acetyl group, is attached to Coenzyme A to form acetyl CoA.