Which statement describes the functioning of photosystem II?
A)Light energy excites electrons in the thylakoid membrane electron transport chain.
B)Photons are passed along to a reaction-centre chlorophyll.
C)The P680 chlorophyll donates a pair of protons to NADP⁺, which is thus converted to NADPH.
D)The electron vacancies in P680⁺ are filled by electrons derived from water.
E)The splitting of water yields molecular carbon dioxide as a by-product.

Question

Quizplus · Accepted Answer

Photosystem II functions by using light energy to excite electrons in the thylakoid membrane electron transport chain. These electrons are then passed along to a reaction-centre chlorophyll (P680), where they are used to fill electron vacancies in P680⁺, which are derived from water. Through this process, oxygen is released as a by-product. The P680 chlorophyll does not donate protons to NADP⁺; this occurs in photosystem I. Additionally, photosystem II does not directly produce CO2 as a by-product; this occurs in the Calvin cycle.

Which Statement Describes the Functioning of Photosystem II