When Do Plants Split Water Providing a Source of Electrons

Question

When do plants split water providing a source of electrons and protons?
A)only in the light
B)only in the dark
C)in both the light and dark
D)only if oxygen is present
E)in both the light and dark, but only if oxygen is present

Accepted Answer

Plants split water during the light-dependent reactions of photosynthesis, which only occur in the presence of light. During these reactions, light energy is used to split water molecules into electrons, protons, and oxygen.