Q. Fixation of one molecule of $CO_{2}$ requires how much (in $C_{4}$-plants). ATP and NADPH respectively
A) 5/2
B) 2/5
C) 2/3
D) 3/2
Explanation
Fixing of one molecule of $CO_{2}$ or carbon needs 5 ATP and 2 NADPH in $C_{4}$-plants. $C_{4}$-plants takes 2 more ATP than $C_{3}$-plants. But, the photorespiration is absent in $C_{4}$-plants, thus $C_{4}$-plants are more economical than $C_{3}$-plant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.