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Distinguish Between Light and Dark Reactions. - Energy Relations - Number of ATP Molecules Generated

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Distinguish between light and dark reactions.

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Solution

Difference between light and dark reactions:-

  Light Reaction   Dark Reaction
1 It requires the presence of light. 1 It occurs independently of the presence of light.
2 It occurs in the grana of chloroplast. 2 It occurs in the stroma of chloroplast.
3 It involves absorption of light energy by photosynthetic pigments and its conversion into chemical energy. 3 It involves the reduction of carbon dioxide into glucose.
4 NADPH2 and ATP are produced. 4 NADPH2 and ATP produced during the light reaction are used.
5 Oxygen is liberated. 5 Oxygen is not liberated.
Concept: Energy Relations - Number of ATP Molecules Generated
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