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Question

Classification of pants as C3 & C4 is based on

A
IstCO2 acceptor
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B
Ist fixation product
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C
Enzyme taking part in CO2 fixation
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D
No of carbons in 1stCO2 acceptor
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Solution

The correct option is B Ist fixation product
In the C3 pathway during CO2 fixation, the photosynthetic plants produce 3-phosphoglyceric acid (PGA) or 3- carbon acid as the first product and in the C4 pathway during CO2 fixation, the photosynthetic plants produce oxaloacetic acid (OAA) a 4 carbon compound as the first product.
So, the correct option is 'Ist fixation product'.

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