Home › NEET UG › biology › Photosynthesis in Higher Plants › Chemiosmotic hypothesis applied to chloroplasts …
Chemiosmotic hypothesis applied to chloroplasts holds that
AProton gradient across thylakoid drives ATP synthesis
BATP is made directly by phosphate transfer
CPhotons directly phosphorylate ADP at PS II
DCalvin cycle produces ATP from CO2 directly
Answer & Solution
Correct answer: A. Proton gradient across thylakoid drives ATP synthesis
Mitchell's chemiosmosis: light-driven proton pumping into the thylakoid lumen creates an electrochemical gradient. Protons flow back through ATP synthase (CF0-CF1) to the stroma, driving ATP synthesis. Analogous to mitochondrial mechanism but with reversed orientation.
Related questions
Blackman's law of LIMITING FACTORS states that the overall rate of photosynthesis is deterThe colour of light LEAST absorbed by chlorophyll (and most reflected by leaves) is:CAM plants (like cactus and pineapple) open their stomata mainly:The C4 pathway (Hatch-Slack) uses which enzyme for the initial CO2 fixation?In the Calvin cycle, CO2 is fixed by the enzyme:In the Z-scheme of photosynthesis, electrons flow:In photosynthesis, the source of O2 released into the atmosphere is:Light reactions of photosynthesis occur in the: