Dark Reactions: Calvin Cycle and C3 Pathway · NCERT Biology

What is the primary reason the 'Reduction' phase is called so?

  1. It reduces the amount of RuBP available in the stroma of chloroplasts.
  2. It reduces the carbon chain from five carbons down to three carbons.
  3. It involves the addition of electrons from NADPH to carbon compounds.
  4. It reduces the internal temperature of the chloroplast during daytime.
Show answer and explanation

Correct answer: It involves the addition of electrons from NADPH to carbon compounds.

The phase is named 'Reduction' because the 3-phosphoglyceric acid is reduced to triose phosphate using the reducing power of NADPH and the energy from ATP.

Difficulty: Medium Question 17 of 20

Practice all 20 Dark Reactions: Calvin Cycle and C3 Pathway questions

Keep practicing

More Dark Reactions: Calvin Cycle and C3 Pathway questions