ï»¿ What are dark reactions ? from Biology Photosynthesis in Higher Plants Class 11 Assam Board

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Photosynthesis in Higher Plants

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What are dark reactions ?

Dark reaction or biosynthetic pathway is the reaction which is not directly dependent on light but is dependent on the products of light reaction which are ATP and NADPH. Â The ATP and NADPH are used to drive the processes leading to the synthesis of food.Â
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Where CO2 assimilation occurs in CPlants ?

In bundle sheath cells.
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What are grana ?

Grana are the stacks of thylakoids embedded in the stroma of a chloroplast. They are the sites of light reaction of photosynthesis.
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Name the first stable compound formed in C3Â cycle.

3-phosphoglyceric acid (PGA)
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Why Rubisco is not affected by O2 in C4 plants ?

O2 is formed in mesophyll cells while Rubisco is present in bundle sheath cells. Therefore Rubisco does not come in contact with O2 and is thus not affected by it.
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What is stroma ?

Stroma is matrix or the cytoplasm of chloroplast where dark reaction of photosynthesis takes place.
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