In photosynthesis, the dark reaction is called so because:

Correct answer: B. It does not require light directly

  • A. It takes place only in the dark
  • B. It does not require light directly
  • C. It occurs during the night only
  • D. It involves only dark-colored pigments

Explanation

The dark reaction is called so because it does not need light directly and uses ATP and NADPH from the light reaction to make glucose from carbon dioxide, occurring in both light and dark conditions. a) It takes place only in the dark-Wrong, because it can occur in light as well. c) It occurs during nighttime only-Wrong, because it is not limited to nighttime. d) It involves only dark-colored pigments-Wrong, because no pigments are involved in the dark reaction.

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