Dark reactions do not occur during the day.

False

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True

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Solution

The correct option is A False

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Question 08
Dark reaction in photosynthesis is called so because
(a) it can occur in dark also
(b) it does not depend on light energy
(c) it cannot occur during day light
(d) it occurs more rapidly at night

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. Does photosynthesis in plants occur only in the day as their are two parts of photosynthesis :light reaction which occurs in the presence of light and dark reaction in which light is not necessary ?

Describe the main chemical changes which occur during photosynthesis in

(i) Light reaction (ii) Dark reaction.

Choose the correct option that describes the reactions involved in photosynthesis.

Statement 1: There are two reactions: Light and Dark

Statement 2: Dark reactions occur only during night time

Statement 3: Calvin-Benson Cycle is a part of the dark reaction

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