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Photosynthesis in Higher Plants

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CBSE Gujarat Board Haryana Board

### Previous Year Papers

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Class 10 Class 12
How many molecules of ATP are required to fix one molecule of CO2 in C4 cycle ?

5 ATP.

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.

What is stroma ?

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

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.

Where CO2 assimilation occurs in CPlants ?

In bundle sheath cells.

Name the first stable compound formed in C3 cycle.

3-phosphoglyceric acid (PGA)

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