Q. Plants in which the first product of $CO_{2}$ fixation is $C_{3}$ acid, $i.e.,\$the …A… pathway, and those in which the first product was $C_{4}$ acid (OAA), $i.e.,$ the …B… pathway Complete the given statement by filling appropriate options in the given blanks
A) A-$C_{2}$; B-$C_{3}$
B) A-$C_{3}$; B-$C_{4}$
C) A-$C_{4}$; B-$C_{2}$
D) A-$C_{2}$; B-$C_{3}$
Explanation
$CO_{2}$ assimilation during photosynthesis generally takes place in two ways in plants (i) $\mathbf{C}_{\mathbf{3}}$ pathway Those plants in which the first product of $CO_{2}$ fixation is a $C_{3}$ acid (PGA), i.e., the $C_{3}$ pathway (ii) $\mathbf{C}_{\mathbf{4}}$ pathway Those plants in which the first product $C_{4}$ acid (OAA), i.e., the $C_{4}$ pathway
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.