Which of the following statements about the light reactions of photosynthesis is true?
A) There are two distinct photosystems, linked together by a mechanism similar to electron transport.
B) The source for electrons is located in the stroma of the thylakoid.
C) The Mn complex is the primary electron acceptor and is located on photosystem I.
D) The ultimate electron donor is molecular oxygen.
E) Plastoquinone is a fixed electron transporter in the system located in the inner membrane.

Question

Quizplus · Accepted Answer

The light reactions involve two distinct photosystems (photosystem I and photosystem II) that are linked together by an electron transport chain. This electron transport chain functions similarly to the electron transport chain found in the mitochondrial membrane. The source for electrons in the light reactions is water, which is located in the lumen of the thylakoid. The Mn complex is the primary electron acceptor and is located on photosystem II. The ultimate electron acceptor in the light reactions is NADP+, not molecular oxygen. Plastoquinone is a mobile electron transporter in the system located in the thylakoid membrane, not the inner membrane.

Which of the Following Statements About the Light Reactions of Photosynthesis