Multiple choice

Which part of photosynthesis does not require light?

  1. The Krebs Cycle

  2. The Calvin Cycle

  3. Photosystem I

  4. Photosystem II
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Calvin Cycle is the light-independent reaction of photosynthesis, which uses the ATP and NADPH produced in the light-dependent reactions to fix carbon. The other options are either light-dependent or part of cellular respiration.

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