Which process yields glucose as a product?

Which process yields glucose as a product?

• A. Glycolysis
• B. Fermentation
• C. Photosynthesis
• D. Citric acid cycle

Answer: (C)

Photosynthesis is the process that builds glucose from carbon dioxide and water using light energy. In chloroplasts, light energizes the reactions that generate ATP and NADPH, which are then used in the Calvin cycle to fix CO2 and synthesize sugars. Over multiple steps, these carbon skeletons are assembled into glucose, which plants can store as starch or use to make sucrose. This contrasts with glycolysis, which breaks down glucose to pyruvate to harvest energy; fermentation, which regenerates NAD+ by converting pyruvate to lactate or ethanol under low oxygen; and the citric acid cycle, which oxidizes acetyl-CoA to CO2 while producing energy carriers, but does not produce glucose.

Photosynthesis is the process that builds glucose from carbon dioxide and water using light energy. In chloroplasts, light energizes the reactions that generate ATP and NADPH, which are then used in the Calvin cycle to fix CO2 and synthesize sugars. Over multiple steps, these carbon skeletons are assembled into glucose, which plants can store as starch or use to make sucrose. This contrasts with glycolysis, which breaks down glucose to pyruvate to harvest energy; fermentation, which regenerates NAD+ by converting pyruvate to lactate or ethanol under low oxygen; and the citric acid cycle, which oxidizes acetyl-CoA to CO2 while producing energy carriers, but does not produce glucose.