Which of the Following Statements Regarding the Light Reactions of Photosynthesis

Question

Which of the following statements regarding the light reactions of photosynthesis is correct?
A)There are 2 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)Plastoquinone is a fixed electron transporter in the system located in the inner membrane.

Accepted Answer

The light reactions of photosynthesis involve two distinct photosystems (photosystem I and II) that are linked together by electron transport chains similar to those found in mitochondria. This process creates a proton gradient which is then used to generate ATP through chemiosmosis. The source of electrons is water, which is split by photosystem II. The Mn complex is the primary electron acceptor in photosystem II, while plastoquinone is a mobile electron transporter in the thylakoid membrane.