Where is the photosynthetic electron transport chain located in plant cells?

• A. In the thylakoid membrane of chloroplasts
• B. In the cytoplasm
• C. In the stroma of chloroplasts
• D. In the mitochondrial matrix

Answer: (A)

Verified step by step guidance

1. Understand the structure of a chloroplast, which is the organelle where photosynthesis occurs in plant cells. It consists of the outer membrane, inner membrane, stroma, and thylakoids.
2. Recognize that the thylakoids are membrane-bound compartments inside chloroplasts, organized into stacks called grana.
3. Learn that the photosynthetic electron transport chain is a series of protein complexes and other molecules that transfer electrons during the light-dependent reactions of photosynthesis.
4. Identify that the thylakoid membrane is the specific location where the photosynthetic electron transport chain is embedded. This is where light energy is converted into chemical energy.
5. Conclude that the correct location of the photosynthetic electron transport chain in plant cells is the thylakoid membrane of chloroplasts, not the cytoplasm, stroma, or mitochondrial matrix.