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Assertion : In light reaction of photosynthesis, light is required for the functioning of PS I and PS II, and production of NADPH and ATP.
Reason : Dark reaction does not occur in light.
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Reason : Dark reaction does not occur in light.
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The correct answer is:
If assertion is true but reason is false.
Light reactions of photosynthesis take place in the presence of light. These involve photolysis of water and production of assimilatory power (NADPH + ATP) through PS I and PS II.
Dark reactions of photosynthesis catalyse assimilation of $\mathrm{CO}_2$ to carbohydrates. Dark reactions are light independent reactions, hence can take place both in the light as well as in the dark.
Dark reactions of photosynthesis catalyse assimilation of $\mathrm{CO}_2$ to carbohydrates. Dark reactions are light independent reactions, hence can take place both in the light as well as in the dark.
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