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What Is Dark Reaction

Which of the ...

Question

Which of the following products from light dependent reaction is used as a source of energy in the light independent reactions?

A

NADPH

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B

Oxygen

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C

Glucose

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D

ADP

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Solution

The correct option is A NADPH
In the light dependent reaction, the assimilatory powers, ATP and NADPH, are formed. These are utilised during light independent reaction and glucose is synthesised.

NADPH is utilised in the Calvin cycle to reduce the intermediates that form carbohydrates. NADPH donates protons and gets oxidised during the Calvin cycle.

Oxygen is evolved during photolysis of water but oxygen is not utilised during light independent reaction for the synthesis of sugars.

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Q. Which of the following statements correctly describes the light reactions and dark reactions taking place during photosynthesis?
(i) Light reactions occur in grana thylakoids whereas dark reactions occur in stroma of chloroplasts.
(ii) Light reactions generate ATP and

N A D P H_{2}

whereas dark reactions consume ATP and

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.
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What Is Dark Reaction

Standard XII Biology

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