FORESTRY
PLANT PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There is one point in the cycle where FAD+ is reduced to FADH2
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During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
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The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
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There are three points in the cycle where NAD+ is reduced to NADH + H+
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Detailed explanation-1: -The correct option is D The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
Detailed explanation-2: -The Krebs cycle starts with condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid. This reaction is catalysed by the enzyme citrate synthase and a molecule of CoA is released.
Detailed explanation-3: -The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid (Figure 14.3). The reaction is catalysed by the enzyme citrate synthase and a molecule of CoA is released Citrate is then isomerised to isocitrate.
Detailed explanation-4: -The first step of the citric acid cycle is the formation of citrate from oxaloacetate and acetyl-CoA. This step is a two-step process that is catalyzed by an enzyme called citrate synthase. The first step of this process is an aldol condensation that produces an intermediate molecule called citryl-CoA.