Question

Photon energy, captured by chlorophyll a, is transferred as chemical energy to

a. carbon dioxide d. carotenoids
b. glucose e. a series of hydrogen acceptors
c. other chlorophylls

Answer 1

e. a series of hydrogen acceptors

Explanation: Excited chlorophyll a donates high‑energy electrons to a primary electron acceptor and then to a chain of electron (hydrogen) carriers, ultimately producing reduced carriers (e.g., NADPH) and ATP. Carotenoids and other chlorophylls act as accessory pigments/antennae that transfer light energy to chlorophyll a, not vice‑versa.