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Questions  

The number of substrate level phosphorylations in one turn of citric acid cycle is :

a
One
b
Two
c
Three
d
Zero

detailed solution

Correct option is A

There is only one substrate level phosphorylation in one turn of citric acid cycle during conversion of succinyl CoA to succinic acid. There is  a molecule of GTP is synthesized during this conversion. During the aerobic respiration of one molecule of  glucose, the TCA cycle is repeated twice and the total number of substrate level phosphorylation is then two.

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Similar Questions

Which of the following reaction is associated with decarboxylation reactions during the Citric acid Cycle?
(a) Isocitrate  α-Ketoglutarate
(b)  α-Ketoglutarate Succinyl CoA
(c) Succinate Fumarate
(d) Pyruvate Acetyl CoA


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