AP BIOLOGY

Detailed explanation-1: -Thylakoids contain molecules of chlorophyll. They are the main functional units of chloroplasts. Light is captured by the reaction center present in the membrane of the thylakoids.

Detailed explanation-2: -The chloroplast. Photosynthesis occurs in the chloroplasts of algae and higher plants. Capture of light energy takes place on the interior membrane surfaces, while reduction of CO2 to carbohydrate occurs in the stroma.

Detailed explanation-3: -Photosynthesis takes place in the organelle of the plant cell known as the chloroplasts. Energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membrane.

Detailed explanation-4: -When a photon reaches the chlorophyll a in the reaction center, that chlorophyll can receive the energy because it absorbs photons of longer wavelengths than the other pigments.