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Ch. 10 - Photosynthesis

Chapter 10, Problem 7

Which process is most directly driven by light energy? a. creation of a pH gradient by pumping protons across the thylakoid membrane b. reduction of NADP+ molecules c. transfer of energy from pigment molecule to pigment molecule d. ATP synthesis

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Hi everyone here, we have a question asking which one of the following reactions does not require the presence of light energy. A oxidation of chlorophyll requires light photo license requires light and a good indicator that it requires light is the word photo, the formation of n A. D. P. H that forms during photosynthesis, so that requires light. And lastly, the Calvin cycle. The Calvin cycle does not require light. Instead, it requires a T p, n a D, p. H, and carbon dioxide. So our answer here is D. The Calvin cycle. Thank you for watching. Bye.