Why Do the Light Reactions Have Both Cyclic and Noncyclic

question 10

Multiple Choice

Why do the light reactions have both cyclic and noncyclic electron pathways?

• A)to ensure that ATP and NAPDH are generated in a 1:1 molar ratio
• B)because only the combination of pathways can generate sufficient NADPH for the light-independent reactions
• C)to provide more electrons from water than would be released by the noncyclic pathway
• D)because the light-independent reactions require ATP and NADPH in different amounts than are generated by noncyclic electron flow

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