Question

During the citric acid cycle: Please choose the correct answer from the following choices, and then select the submit answer button. ATP is synthesized by substrate-level phosphorylation. fuel molecules are completely reduced. high-energy electrons are removed from NAD+ and FADH. ATP is synthesized by oxidative phosphorylation.

Answer 1

The correct answer will be option-ATP is synthesized by substrate-level phosphorylation.

Step-by-step explanation:

Citric acid cycle or the Krebs cycle is the series of chemical change taking place during the cellular respiration which releases stored energy through the oxidation of acetyl-CoA.

During the Citric acid cycle, 2 ATP, 6 NADH and 2 FADH₂ are released by two acetyl CoA oxidation. The production of ATP takes place during the conversion of Succinyl CoA to succinate where the released energy is used to form GTP which then converts to ATP.

Thus, ATP is synthesized by substrate-level phosphorylation is the correct answer.

Answer 2

ATP is synthesized by substrate-level phosphorylation.

Step-by-step explanation:

ATP synthesis by substrate-level phosphorylation includes phosphorylation of ADP into ATP coupled with an exergonic reaction. Here, the electrochemical gradient does not drive the ADP phosphorylation as it occurs during the process of oxidative phosphorylation.

The citric acid cycle is the second stage of aerobic cellular respiration and includes a set of reactions that oxidize the acetyl CoA completely into CO2 and H2O. During the conversion of succinyl CoA into succinate, removal of CoA releases a large amount of energy which in turn is used to drive the phosphorylation of GDP into GTP or ADP into ATP.