Complete oxidation of glucose to CO₂involves two different mechanisms for synthesizing ATP: oxidative phosphorylation and substrate-level phosphorylation. Which is TRUE of substrate-level phosphorylation?

Question

Quizplus · Accepted Answer

Substrate-level phosphorylation involves the transfer of a phosphate group from an organic molecule to ADP with the help of an enzyme, resulting in the direct formation of ATP. This process occurs during glycolysis and the Krebs cycle. Although substrate-level phosphorylation is an important mechanism for ATP synthesis, most of the ATP generated in cellular respiration is actually produced through oxidative phosphorylation. Oxidative phosphorylation involves the transfer of high-energy electrons from electron carriers (such as NADH and FADH2) to an electron transport chain, which ultimately leads to the generation of a proton gradient and the production of ATP.

Complete Oxidation of Glucose to CO2 involves Two Different Mechanisms

Complete Oxidation of Glucose to CO₂involves Two Different Mechanisms