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What Is Dark Reaction

Question 26 W...

Question

Question 26
Which products formed during the light reaction of photosynthesis are used to drive the dark reaction?

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Solution

ATP and NADPH formed during light reaction of photosynthesis are used in dark reaction for fixing $C O_{2}$ and to form glucose molecule.

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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

N A D P H_{2}

.
(iii) Oxygen is released as a by-product during the light reactions as well as dark reactions.
(iv) Light reactions take place in the presence of light and dark reactions are independent of the products formed during light reactions.

Q. What is the first stable product formed during dark reaction of photosynthesis?

Q. Which of the following products of the light reaction are subsequently used during the biosynthetic phase of photosynthesis?

Describe the main chemical changes which occur during photosynthesis in

(i) Light reaction (ii) Dark reaction.

During light reaction in photosynthesis, the following are formed.

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