A substrate- level phosphorylation occurs in the Krebs cycle where A) GDP is phosphorylated to produce GTP. B) acetylation of oxaloacetate takes place. C) NAD⁺is phosphorylated to NADH. D) oxaloacetate is phosphorylated.

Question

Quizplus · Accepted Answer

During the Krebs cycle, GDP is phosphorylated to produce GTP through a process known as substrate-level phosphorylation. This GTP can then be used to provide energy for cellular processes. Option B is incorrect because acetylation does not involve the addition of a phosphate group. Option C is incorrect because the given formula (NAD⁺) is not a valid representation of any compound in the Krebs cycle, and no phosphorylation reaction matches this description. Option D is incorrect because there is no phosphorylation of oxaloacetate in the Krebs cycle.

A Substrate- Level Phosphorylation Occurs in the Krebs Cycle Where