NEETBotanyPhotosynthesis in Higher Plants
Match List-I with List-II regarding the requirements of chemiosmosis in chloroplasts: List-I List-II (A) Membrane (I) Contains a channel for facilitated diffusion of protons (B) Proton pump (II) Its breakdown provides energy to drive ATP synthesis (C) Proton gradient (III) Required to create an enclosed space for accumulation of protons (D) ATP synthase (IV) Transports protons from the stroma into the lumen Choose th
Options
- A(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- B(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
- C(A)-(II), (B)-(IV), (C)-(III), (D)-(I)
- D(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Correct answer
B. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Step-by-step solution
According to the chemiosmotic hypothesis, ATP synthesis requires a membrane, a proton pump, a proton gradient, and ATP synthase. The membrane creates an enclosed space (the thylakoid lumen) to allow the accumulation of protons. The proton pump actively transports protons from the stroma into the lumen against their concentration gradient. The proton gradient is the store of energy; its breakdown provides the energy required to drive ATP synthesis. ATP synthase consists of a CF₀ part that acts as a transmembrane cha