Question

Classification of pants as $C_3$ & $C_4$ is based on

• A. $I^{st}C{O}_2$ acceptor
• B. $I^{st}$ fixation product
• C. Enzyme taking part in $C{O}_2$ fixation
• D. No of carbons in $1^{st}C{O}_2$ acceptor

Answer 1

The correct option is B $I^{st}$ fixation product

In the C${}_3$ pathway during CO${}_2$ fixation, the photosynthetic plants produce 3-phosphoglyceric acid (PGA) or 3- carbon acid as the first product and in the C${}_4$ pathway during CO${}_2$ fixation, the photosynthetic plants produce oxaloacetic acid (OAA) a 4 carbon compound as the first product.

So, the correct option is 'Ist fixation product'.