Which two main stages of photosynthesis are described, and what are their primary outputs?

• A. Light reactions produce ATP, NADPH, and O2; Calvin cycle uses ATP and NADPH to biosynthesize sugars.
• B. Light reactions produce CO2 and water; Calvin cycle produces ATP.
• C. Light reactions produce sugars directly; Calvin cycle uses NADPH to produce ATP.
• D. Light reactions produce chlorophyll only; Calvin cycle produces oxygen.

Answer: (A)