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

Question

Quizplus · Accepted Answer

During the Krebs cycle, GDP is phosphorylated to produce GTP via substrate-level phosphorylation. This occurs when a phosphate group is transferred directly from a substrate molecule to ADP or GDP to form ATP or GTP, respectively.

A Substrate-Level Phosphorylation Occurs in the Krebs Cycle When _____