Cyclic photophosphorylation occurs in which part of the chloroplast and produces what?

Cyclic photophosphorylation occurs in which part of the chloroplast and produces what?

• A. Thylakoid membranes; only produces NADPH
• B. Stroma lamellae; only produces ATP
• C. Stroma; produces glucose
• D. Granum; produces oxygen

Answer: (B)

Cyclic photophosphorylation occurs in the thylakoid membranes of the chloroplasts. This process involves the movement of electrons through photosystem I, where the energy generated during electron transport is used to pump protons into the thylakoid lumen. This creates a proton gradient that drives ATP synthase to produce ATP when protons flow back into the stroma. The primary product of cyclic photophosphorylation is ATP. Unlike non-cyclic photophosphorylation, it does not produce NADPH or oxygen as there is no involvement of water splitting in this cycle. Therefore, while the process of cyclic photophosphorylation is focused on generating ATP, the other components, like NADPH and oxygen, are associated with different pathways of photosynthesis. Each of the other answer choices contains inaccuracies regarding the location and products of cyclic photophosphorylation, emphasizing that this process is specifically designed to enhance the ATP supply in the chloroplast.

Cyclic photophosphorylation occurs in the thylakoid membranes of the chloroplasts. This process involves the movement of electrons through photosystem I, where the energy generated during electron transport is used to pump protons into the thylakoid lumen. This creates a proton gradient that drives ATP synthase to produce ATP when protons flow back into the stroma.

The primary product of cyclic photophosphorylation is ATP. Unlike non-cyclic photophosphorylation, it does not produce NADPH or oxygen as there is no involvement of water splitting in this cycle. Therefore, while the process of cyclic photophosphorylation is focused on generating ATP, the other components, like NADPH and oxygen, are associated with different pathways of photosynthesis.

Each of the other answer choices contains inaccuracies regarding the location and products of cyclic photophosphorylation, emphasizing that this process is specifically designed to enhance the ATP supply in the chloroplast.