Which of the following statements is NOT true regarding the dark reaction of photosynthesis?
Question and options
Which of the following statements is NOT true regarding the dark reaction of photosynthesis?
- Dark reaction takes place only in the absence of light
- Dark reaction includes the Calvin Cycle
- Dark reaction requires ATP and NADPH
- Carbohydrates are formed in dark reaction
Answer and explanation
Correct answer: A - Dark reaction takes place only in the absence of light
The 'dark' reaction (Calvin cycle) does not need darkness; it happens mainly in light, using ATP and NADPH from the light reactions. Saying it occurs only in the absence of light is false.
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