AP Biology

Answer: C, The organelle that is involved in photosynthesis is the chloroplast. Of the answer choices, it is the only organelle that is unique to plant cells.

Key Takeaway: Chloroplasts capture light energy to conserve free energy in the form of ATP and reduce NADP to NADPH through the process of reactions known as photosynthesis. The light-absorbing pigments, including chlorophyll and carotenoids, and the proteins that bind those pigments are found there. Chloroplasts have a similar structure to mitochondria in that they both contain an outer membrane and an inner membrane within the organelle.