Correct Answer: D
Explanation:
Chlorophyll molecules are the photosynthetic pigments embedded in protein in the thylakoid membrane. They are tetrapyrroles similar to haem in structure, but with magnesium at the centre instead of iron. A long hydrophobic side chain anchors them in hydrophobic regions of protein in the membrane. Chlorophyll molecules do not make up the electron transport chains in photosynthesis, and they are not found in the stroma. Chlorophyll molecules appear green because they absorb light in the red and blue range and reflect or transmit green light.