Biology, Eighth Edition (Raven)

Chapter 8: Photosynthesis

Cyclic and Noncyclic Photophosphorylation

View the animation below, then complete the quiz to test your knowledge of the concept.



1.

Cyclic photophosphorylation produces
A)energy only.
B)reducing power only.
C)both energy and reducing power.
D)neither energy nor reducing power.
E)either energy or reducing power, depending on the organism.
2.

In noncyclic photophosphorylation, the electrons passed down through the electron transport system are obtained from
A)sunlight.
B)sugar.
C)chlorophyll.
D)water.
E)carbon dioxide.
3.

Which of the following represents a correct sequence in noncyclic photophosphorylation?
A)photosystem I -> ATP production -> photosystem II -> NADPH production
B)photosystem I -> NADPH production -> photosystem II -> ATP production
C)photosystem II -> ATP production -> photosystem I -> NADPH production
D)photosystem II -> NADPH production -> photosystem I -> ATP production
E)photosystem I -> photosystem II -> ATP production -> NADPH production
4.

Cyclic photophosphorylation involves a single photosystem.
A)True
B)False
5.

Oxygen is produced in noncyclic photophosphorylation but not in cyclic photophosphorylation.
A)True
B)False
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