The electrons used in photosynthesis come first from this molecule or atom: A) Hydrogen (H₂). B) Manganese atom (Mn). C) NADPH D) Oxygen (O₂). E) Water (H₂O).

Question

Quizplus · Accepted Answer

The electrons used in photosynthesis first come from water (H2O). During the light-dependent reactions of photosynthesis, water molecules are split in a process known as photolysis, releasing electrons, hydrogen ions, and oxygen.

The Electrons Used in Photosynthesis Come First from This Molecule