Question

Photosynthesizing plants rely on water to:

a) replace electrons that are excited by light energy and passed from molecule to molecule down an electron transport chain.
b) replenish oxygen molecules that are lost during photosynthesis.
c) provide the protons necessary to produce chlorophyll.
d) concentrate the beams of light hitting a leaf, focusing them on the reaction center.
e) serve as a high-energy electron carrier."

Answer 1

Photosynthesizing plants rely on water to replace electrons that are excited by light energy and passed from molecule to molecule down an electron transport chain.

Step-by-step explanation:

Photosynthesizing plants rely on water to:
a) replace electrons that are excited by light energy and passed from molecule to molecule down an electron transport chain.

Water molecules are split during photosynthesis in a process called photolysis. This results in the release of protons (H+ ions), electrons, and oxygen. The electrons replace the excited electrons in chlorophyll molecules so that photosynthesis can continue.

Water is not involved in replenishing oxygen molecules lost during photosynthesis.