NEETBotanyPhotosynthesis in Higher Plants
What is the main difference in proton accumulation between photosynthesis and respiration?
Options
- AIn photosynthesis, protons accumulate outside the membrane
- BIn photosynthesis, protons accumulate inside the membrane
- CIn respiration, protons accumulate inside the membrane
- DThere is no difference in proton accumulation
Correct answer
B. In photosynthesis, protons accumulate inside the membrane
Step-by-step solution
how actually ATP is synthesised in the chloroplast. The chemiosmotic hypothesis has been put forward to explain the mechanism. Like in respiration, in photosynthesis too, ATP synthesis is linked to development of a proton gradient across a membrane. This time these are the membranes of thylakoid. There is one difference though, here the proton accumulation is towards the inside of the membrane, i.e., in the lumen. In respiration, protons accumulate in the intermembrane space of the mitochondria when electrons move