ï»¿ How is C4Â pathway more energy expensive that C3Â ? from Biology Photosynthesis in Higher Plants Class 11 Assam Board

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How is C4Â pathway more energy expensive that C3Â ?

C3Â Cycle needs 18 ATP molecules for synthesis of one molecule of glucose whereas the C4Â cycle needs 30 ATP molecules. Due to high energy requirement C4Â cycle is more energy expensive than the C3 cycle.
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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 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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Where CO2 assimilation occurs in CPlants ?

In bundle sheath cells.
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Name the first stable compound formed in C3Â cycle.

3-phosphoglyceric acid (PGA)
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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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