Photophosphorylation
Which term describes ATP production resulting from the capture of light energy by chlorophyll?
Photophosphorylation is the process of converting light energy into chemical energy by producing ATP molecules. This process occurs in the thylakoid membrane of chloroplasts during the light-dependent reactions of photosynthesis.
During photophosphorylation, light energy is absorbed by chlorophyll pigments in the thylakoid membrane. This energy is then transferred to a reaction center, where it excites an electron to a higher energy level. This electron is then passed through a series of electron carriers, releasing energy as it goes. This energy is used to pump protons from the stroma into the thylakoid space, creating a proton gradient across the membrane.
As protons flow back across the membrane through ATP synthase channels, ATP is synthesized from ADP and inorganic phosphate. The energy released by the proton flow drives this reaction, producing ATP that can be used by the plant for energy.
Overall, photophosphorylation is a critical process in photosynthesis that converts light energy into usable chemical energy, allowing plants to produce ATP for growth and metabolism.
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