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In which of the following steps of the Krebs cycle, substrate level phosphorylation occurs?

Option: 1

Citrate to isocitrate


Option: 2

Alpha-ketoglutarate to succinate


Option: 3

Succinyl Co-A to succinate


Option: 4

Malate to oxaloacetate


Answers (1)

best_answer
 

CoA is removed from succinyl-CoA to produce succinate. The energy released is used to make guanosine triphosphate (GTP) from guanosine diphosphate (GDP) and Pi by substrate-level phosphorylation. GTP can then be used to make ATP. The enzyme succinyl-CoA synthase catalyzes this reaction of the citric acid cycle.

Hence the correct option is c.
Posted by

Suraj Bhandari

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