Normally, xanthophylls are present in the thylakoid membrane and are associated with photosystem II. If a mutation occurred that reduced the amount of xanthophylls in the thylakoid membrane, which of the following would you predict would happen?
A)The levels of harmful, reactive oxygen species in the cell would increase.
B)NADPH production would increase under conditions of intense light.
C)Levels of reactive oxygen species in the thylakoid lumen would drop dramatically.
D)The rate of cyclic electron transport would increase.

Question

Quizplus · Accepted Answer

Xanthophylls are important for dissipating excess energy and preventing damage from reactive oxygen species (ROS) in the thylakoid membrane. If their levels were reduced, there would be less protection from ROS, leading to an increase in harmful ROS in the cell. Choices B, C, and D are not directly related to the presence or absence of xanthophylls.

Normally, Xanthophylls Are Present in the Thylakoid Membrane and Are