Question

what happens to water when photosystem ii is activated by light during photosynthesis?
water is sent from the leaves to the roots.
water is split into oxygen, electrons, and hydrogen ions.
water is absorbed from the air through the leaves.

Explanation:

When Photosystem II is activated by light in photosynthesis, it initiates a process called photolysis of water. Water molecules are broken down into oxygen (which is released as a by - product), electrons (used in the electron - transport chain), and hydrogen ions (contribute to the proton gradient).

Answer:

B. Water is split into oxygen, electrons, and hydrogen ions.