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Q.

Identify the correct statements regarding chemi-osmotic hypothesis.
(a) Cytochrome $b_{6} / f$ acts as proton pump.
(b) ${CF}_{0}$ forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane
(c) Conformational change in the ${CF}_{1}$ 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 within the thylakoid lumen.
(e) ATP synthesis occurs due to breakdown of proton concentration gradient established between lumen and stroma.

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a

(a), (b), (c) and (e)

b

(b), (c) and (d)

c

(a), (b),(d) and (e)

d

(a), (b) and (d)

answer is D.

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Detailed Solution

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Energy is used to pump protons across thylakoid membrane, to create a gradient or a high concentration of protons within the thylakoid lumen.

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Identify the correct statements regarding chemi-osmotic hypothesis.(a) Cytochrome b6/f acts as proton pump.(b) CF0 forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane(c) Conformational change in the CF1 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 within the thylakoid lumen.(e) ATP synthesis occurs due to breakdown of proton concentration gradient established between lumen and stroma.