Multiple choice

The decomposition of water into hydrogen and oxygen by light energy is called _____.

  1. photosynthesis

  2. photoreceptors

  3. photolysis

  4. photons

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Photolysis is the light-driven decomposition of water into hydrogen and oxygen, occurring during photosynthesis' light-dependent reactions. Chlorophyll absorbs light energy to split water molecules, releasing electrons for the electron transport chain and oxygen as a byproduct.