Which part of the photosystem is responsible for accepting a light photon?

• A. Chlorophyll
• B. Reaction Center
• C. Primary Acceptor
• D. Cytochrome

Answer: (A)

Verified step by step guidance

1. Understand the structure of a photosystem, which is a complex of proteins and pigments found in the thylakoid membranes of chloroplasts.
2. Recognize that chlorophyll molecules are the primary pigments responsible for capturing light energy. They absorb photons and become excited.
3. Identify the reaction center as the part of the photosystem where the excited chlorophyll molecules transfer their energy.
4. Learn that the primary acceptor is the molecule that receives the excited electrons from the chlorophyll in the reaction center.
5. Note that cytochrome is part of the electron transport chain, which is involved in transferring electrons but not directly in photon acceptance.