​How Does the Cyclic Pathway of Light-Dependent Reactions Differ from Noncyclic

question 51

Multiple Choice

​How does the cyclic pathway of light-dependent reactions differ from noncyclic reactions?

• A)​Photolysis is performed by photosystem II in the cyclic pathway, but by photosystem II in the noncyclic pathway.
• B)​The noncyclic pathway uses electrons from water to produce ATP, while the cyclic pathway uses electrons from water to produce sugars.
• C)​The noncyclic pathway evolved before the cyclic pathway and does not produce sugars.
• D)​The cyclic pathway evolved before the noncyclic pathway and does not produce oxygen.
• E)​Although the noncyclic reactions evolved first, carbon fixation occurs in both cyclic and noncyclic reactions.

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