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NEET UG BIOLOGY MCQ: PHOTOSYNTHESIS IN HIGHER PLANTS
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Understanding
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Identifying the correct statements regarding chemiosmotic hypothesis
a) Cytochrome acts a proton pump
b) forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane
c) Conformational change in the particle of the ATP synthase leads to ATP formation
d) Energy is not used to pump protons across a membrane, to create a gradient or a high concentration of protons with in the thylakoid lumen.
e) ATP synthesis occurs due to breakdown of proton concentration gradient established between lumen and stroma.
a) Cytochrome acts a proton pump
b) forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane
c) Conformational change in the particle of the ATP synthase leads to ATP formation
d) Energy is not used to pump protons across a membrane, to create a gradient or a high concentration of protons with in the thylakoid lumen.
e) ATP synthesis occurs due to breakdown of proton concentration gradient established between lumen and stroma.
View answer and explanation
Correct option: D
a, b, c and e
The correct answer is D (a, b, c and e) because these statements accurately describe the chemiosmotic hypothesis related to ATP synthesis in chloroplasts.
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I. When only PS I is functional, cyclic flow of electrons is not possible
II. The breakdown of the gradient provides enough to make the enzyme synthesis
III. The NADP reductase enzyme is located of the thylakoid membrane
IV. Proton gradient increases due to and Cyt . Law of limiting factors was given by
I. When only PS I is functional, cyclic flow of electrons is not possible
II. The breakdown of the gradient provides enough to make the enzyme synthesis
III. The NADP reductase enzyme is located of the thylakoid membrane
IV. Proton gradient increases due to and Cyt . Law of limiting factors was given by