Which of the following statements about dark reaction is correct?

They occur in darkness.

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They are not light dependent.

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They are dependent upon the products synthesized during light reactions.

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All of these

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Solution

The correct option is C
They are dependent upon the products synthesized during light reactions.

After ATP is formed in the first part of photosynthesis, for living things to grow, reproduce and repair themselves, the inorganic form of ${C O}_{2}$ must be transformed into carbohydrate. These reactions occur in stroma or matrix of chloroplasts and all the enzymes required for the processes are present in the stroma of chloroplasts. These reactions do not require light, instead assimilatory power (ATP and NADPH) produced during the light reaction is used in fixation and reduction of ${C O}_{2}$ .

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Similar questions

N A D P H_{2}

N A D P H_{2}

	Light reaction	Dark reaction
i	These are also called as biosynthetic phase	These are also called as photochemical phase
ii	These reaction occur over thylakoids.	These reaction occur in stroma of chloroplasts.
iii	These produce assimilatory power i.e. $N A D P H_{2}$ and ATP	These consume $N A D P H_{2}$ and ATP.
iv	These are direction dependent upon light.	These depend upon the products synthesised during light reaction

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