Question

During light reaction, the process that takes place inside the plant is

• A. Chlorophyll molecules get excited and emit electron.
• B. ATP is synthesized from ADP.
• C. Photolysis of water.
• D. All of the above.

Answer 1

Answer: (D)

All of the above.

Light reaction of the photosynthesis starts from the excitation of chlorophyll by a photon. When a photon of light energy falls on chlorophyll molecule, it gets excited and moves on to a higher level called excited singlet state. The electron gap in the photosystem is further filled by the process of photolysis.

The process of water dissociation during photosynthesis is called as photo-oxidation of water. It produces oxygen as a waste product. It takes place during the light reaction of photosynthesis.

ATP is synthesized from ADP by the process of photophosphorylation. It is utilized for fixation of carbon during the dark reaction.

So, the correct answer is option D.