Which of the following reactions of the citric acid cycle is a decarboxylation occurring?
A)conversion of succinyl CoA to sucicinyl
B)conversion of isocitrate to α-ketoglutarate
C)α-ketoglutarate to succinyl CoA
D)All three reactions are decarboxylations.
E)only B and C

Question

Quizplus · Accepted Answer

The conversion of isocitrate to α-ketoglutarate and α-ketoglutarate to succinyl CoA are both decarboxylations, meaning that a carbon molecule is removed from the starting molecule. However, the conversion of succinyl CoA to succinate does not involve decarboxylation. Therefore, choice E (only B and C) is the correct answer as both of those reactions involve decarboxylation.

Which of the Following Reactions of the Citric Acid Cycle