In which reactions of cellular respiration and fermentation does substrate-level phosphorylation occur?
A) only in glycolysis
B) only in the citric acid cycle
C) only in the electron transport chain
D) in both glycolysis and the citric acid cycle

Question

Quizplus · Accepted Answer

Substrate-level phosphorylation occurs in both glycolysis and the citric acid cycle. During glycolysis, two molecules of ATP are produced through substrate-level phosphorylation while during the citric acid cycle, one molecule of GTP (which can be converted to ATP) is produced through substrate-level phosphorylation. The electron transport chain, on the other hand, generates ATP via oxidative phosphorylation.

In Which Reactions of Cellular Respiration and Fermentation Does Substrate-Level