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Light Reaction

Which of the ...

Question

Which of the following does not participate, when the light reaction synthesise only ATP or performs the cyclic flow of electron?

A

PS-I

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B

PS-II

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C

Ferredoxin

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D

Plastocyanin

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Solution

The correct option is B PS-II
The PSII receive electron for excitation from water. These electrons react with plastocyanin and enter the PS1 where it reacts with ferredoxin. This shows PSII is not involved in ATP synthesis. Hence the correct answer is option B.

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Q. Cyclic-electron flow in the chloroplast during the light-dependent reactions will produce which of the following compounds?
I. ATP
II. Glucose
III. NADPH

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.

Q. Read the following four statements, A, B, C and D and select the right option having both correct statements.
Statement :
(A) Z scheme of light reaction takes place in presence of PS-I only.
(B) Only PS-I is functional in cyclic photophosphorylaiton.
(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH

_{2}

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(D) Stroma lamellae lack PS-II as well as NADP.

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 PSI only.
(B) Only PS1 is functional in cyclic photophosphorylation.
(C) Cyclic photophosphorylation results into synthesis of ATP and

N A D P H_{2}

.
(D) Stroma lamellae lack PS II as well as NADP.

Q. The following (P through U) are the main steps of chemosynthetic ATP synthesis in the light reaction. Which places them in correct order?
P.

H^{+}

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H^{+}

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R. Carriers use energy from electrons to move

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S. Electrons from PSII pass along electron transport chain
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