Question

question 5
most of the nadh generated during aerobic respiration comes from:
glycolysis
chemiosmosis
preparatory (prep) reaction
citric acid cycle
electron transport chain

Explanation:

• Glycolysis produces 2 NADH per glucose molecule.
• The preparatory (prep) reaction produces 2 NADH per glucose molecule.
• The citric acid cycle (Krebs cycle) produces 6 NADH per glucose molecule.
• Chemiosmosis and the electron transport chain do not generate NADH; chemiosmosis is involved in ATP synthesis using the proton - motive force, and the electron transport chain oxidizes NADH (it does not produce it).

Since the citric acid cycle produces the most NADH among the given options, it is the correct answer.

Answer:

citric acid cycle