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Light Reactions

What are the ...

Question

What are the end products of light reaction and dark reaction?

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Solution

The light reaction involves both cyclic and non cyclic phosphorylation. The end products are ATP & NADPH whereas the end product of dark reaction is carbohydrates.

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Q. What are the end products of light reactions?

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. Assertion :Dark reactions are called bio synthetic phase of photosynthesis . Reason: Dark reactions do not directly depend on the presence of light but are dependent on the products of the light reactions ,i.e. ATP and NADPH.

What are light and dark reactions?

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

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