Question

Which statement describes the light reaction of photosynthesis?

A. Water molecules are combined to make food.
B. Air and water create energy for a plant.
C. Carbon dioxide is put together with glucose.
D. Water molecules are split apart.

Answer 1

It would be D. Water molecules are split apart and the byproduct of that would be the O2. As energy enters the chloroplasts, the energy excited the H2O molecules and causes them to split

Answer 2

Answer: D. Water molecules are split apart

Explanation: During Light reactions of Photosynthesis, the chlorophyll located in the chloroplast will be activated by light energy from the sun. Thus the light activated chlorophyll will split the water molecule.

This process of splitting of water molecules is called Photolysis. Water molecule are splited to release Hydrogen ions and also oxygen.