Question

unit 2 exam 2025-26
krebs cycle : carbon dioxide ::
glycolysis : glucose
acetyl coa formation : oxygen
cellular respiration : oxygen
electron transport chain: atp

Explanation:

The Krebs cycle produces carbon - dioxide as a by - product. The electron transport chain produces ATP as a major product. In glycolysis, glucose is the starting molecule, not a product. In acetyl - CoA formation, oxygen is not the main product. In cellular respiration, oxygen is a reactant, not a product.

Answer:

D. Electron Transport Chain: ATP