What happens in photosystem II?

Question

What happens in photosystem II?

Excited electrons are used to split water molecules.

Excited electrons are transferred to an electron transport chain.

Electrons are reenergized to be used in NADPH production.

Answer 1

In photosystem II, excited electrons are used to split water molecules. This process is known as photolysis, where light energy is used to break water molecules into oxygen, hydrogen ions, and electrons. These electrons are then transferred to an electron transport chain, where they undergo a series of redox reactions to generate energy-rich molecules like ATP and NADPH. So, while reenergization of electrons occurs in the process, it is not the main purpose of photosystem II.