Question

question
most of the nadh that delivers electrons to the electron transport chain comes from which of the following processes?
answer
the citric acid cycle
glycolysis
oxidative phosphorylation
anabolic pathways
substrate - level phosphorylation
i dont know yet

Explanation:

• Citric acid cycle: Produces a large amount of NADH. In one turn of the citric acid cycle, 3 molecules of NADH are generated.
• Glycolysis: Produces only 2 molecules of NADH per glucose molecule.
• Oxidative phosphorylation: Uses NADH (and FADH₂) to generate ATP, it does not produce NADH.
• Anabolic pathways: Generally consume energy (ATP) and reducing power (NADPH in many cases), not major producers of NADH for the electron - transport chain.
• Substrate - level phosphorylation: Directly transfers a phosphate group to ADP to form ATP (e.g., in glycolysis and citric acid cycle), but it is not a process that mainly produces NADH.

Answer:

The citric acid cycle