Final answer:
During the catabolism of glucose, only acetyl CoA, FADH₂, and NADH are produced exclusively in the Krebs cycle.
Step-by-step explanation:
The correct answer is b. acetyl CoA; FADH₂; NADH. In the catabolism of glucose, the Krebs cycle, also known as the citric acid cycle, generates high-energy molecules including NADH, FADH₂, and ATP. Pyruvate, one of the products of the catabolism of glucose, enters the Krebs cycle to produce these molecules. NADH and FADH₂ are electron-carrying molecules that play a crucial role in the electron transport chain, which ultimately leads to the production of ATP. Therefore, only acetyl CoA, FADH₂, and NADH are produced exclusively in the Krebs cycle.
During the catabolism of glucose, FADH2 is produced only in the Krebs cycle. While both NADH and ATP are also produced during the Krebs cycle, they are not exclusive to this process as NADH is also produced during glycolysis and ATP is generated in several stages including glycolysis and oxidative phosphorylation. Pyruvate is formed during glycolysis and is not a product of the Krebs cycle; instead, it is the substrate that enters the cycle after being converted to acetyl-CoA