CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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6 carbon compound; acetate
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3 carbon compound; acetyl-CoA
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4 carbon compound; acetyl-CoA
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4 carbon compound; citric acid
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6 carbon compound; citric acid
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Detailed explanation-1: -The glycolysis of a single glucose molecule gives two pyruvic acid molecules comprising three carbons each. Each of these pyruvate molecules undergoes acetylation and decarboxylation, to give Acetyl coenzyme A and carbon dioxide. Thus, each molecule of Acetyl CoA has two carbon atoms.
Detailed explanation-2: -In the first step of the cycle, acetyl CoAstart text, C, o, A, end text combines with a four-carbon acceptor molecule, oxaloacetate, to form a six-carbon molecule called citrate.
Detailed explanation-3: -Thiamine pyrophosphate (cocarboxylase) is an essential enzyme for this process. Acetyl coenzyme A is a two-carbon substance and it condenses with oxaloacetic acid which is a four-carbon dicarboxylic acid to yield a six-carbon tricarboxylic acid, namely, citric acid (or citrate).