In Kreb’s cycle GTP is formed in

Options

(a) substrate level phosphorylation
(b) oxidative phosphorylation
(c) non-cyclic photophosphorylation
(d) cyclic photophosphorylation

Correct Answer:

substrate level phosphorylation

Explanation:

In Krebs cycle, GTP is formed during the conversion of succinyl CoA to succinic acid or succinate. The enzyme required for this reaction is succinyl thiokinase. The phosphorylation in this reaction is substrate level phosphorylation where ATP synthesis is directly linked to the liberation of energy.