Final answer:
The citric acid cycle yields three NADH + H+ for each turn, and with two turns of the cycle per glucose molecule, it totals six NADH + H+.
Step-by-step explanation:
The citric acid cycle, which is a key component of cellular respiration, produces three molecules of NADH + H+ per turn. An acetyl group from acetyl CoA combines with a four-carbon oxaloacetate molecule to form a six-carbon citrate. As citrate goes through the cycle, it is oxidized to release two molecules of CO2 for each acetyl group. Moreover, the cycle generates one molecule of FADH2 and one molecule of GTP or ATP. This cycle occurs in the mitochondria of cells and is crucial for the production of ATP, which is used by the cell for energy. It is worth noting that each molecule of glucose results in two turns of the citric acid cycle, yielding a total of 6 NADH, 2 FADH2, and 2 ATP.