Question

which step is a part of the dark (light-independent) reactions?
○ atp molecules are produced.
○ solar energy is absorbed by chloroplasts.
○ carbon dioxide is used to form simple sugars.
○ oxygen is released when water molecules are split.

Explanation:

• Light - independent (dark) reactions of photosynthesis (also known as the Calvin cycle) use ATP and NADPH from light - dependent reactions, and carbon dioxide to produce simple sugars (like glucose).
• ATP production, absorption of solar energy, and water splitting (which releases oxygen) are all part of the light - dependent reactions, not the dark reactions.

Answer:

Carbon dioxide is used to form simple sugars.