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Difference between Cyclic and Non-Cyclic Photophosphorylation

Non-cyclic ph...

Question

Non-cyclic photophosphorylation results in the formation

A

NADPH

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B

ATPO₂

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C

O₂

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D

ATP, NADPH and O₂

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Solution

The correct option is D
ATP, NADPH and O₂

The non-cyclic electron transport is accompanied by proton translocation and oxidation of water. Oxidation of water releases $O_{2}$ , electron movement results in NADPH formation and proton translocation yields ATPs.

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Q. Assertion :Cyclic photophosphorylation synthesizes ATP Reason: ATP synthesize in cyclic photophosphorylation is not associated with NADPH formation

Q. Assertion : In case of cyclic photophosphorylation, there is no production of NADPH and oxygen.

Reason : As the electron flows cyclically and NADPH is present in sufficient amount in the cell, hence, cyclic photophosphorylation occurs to provide ATP to power other activities in chloroplast.

Q. How are ATP, NADPH and oxygen produced in noncyclic photophosphorylation.

Q. Assertion: Cyclic photo phosphyorylation synthesizes ATP.
Reason: ATP synthesize in cyclic phosphyorylation is associated with NADPH formation.

Q. Read the following four statements a, b, c and d and select the right option having both correct statements.
(a) Z-scheme of light reaction takes place in presence of PS I only.
(b) Only PS I is functional in cyclic photophosphorylation.
(c) Cyclic photophosphorylation results into the synthesis of ATP and NADPH.
(d) Stroma lamellae lack PS II as well as NADP.

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