The light reactions A) require light of any wavelength. B) result in the hydrolysis of ATP. C) produce NADPH used in the Calvin cycle. D) occur in C₄ plants only. E) take place in the stroma.

Question

Quizplus · Accepted Answer

The light reactions produce ATP and NADPH, which are both used in the Calvin cycle to produce carbohydrates. NADPH is specifically produced in the light reactions and is used as a reducing agent in the Calvin cycle. Additionally, the light reactions require light energy of specific wavelengths to occur, ruling out choice A. Choice B is incorrect because the light reactions actually use energy from ATP, rather than producing it. Choice D is also incorrect because the light reactions occur in both C3 and C4 plants, not just C₄ plants. Finally, choice E is incorrect because the light reactions occur in the thylakoid membrane of the chloroplast, not in the stroma.

The Light Reactions