Q. Radioactive $C^{14}$ is given to carbon dioxide and released to atmosphere. This carbon dioxide is taken by RuBP in a $C_{3}$-plants. First radioactive $C^{14}$is seen, in which compound?
A) PGAL
B) PEP
C) RMP
D) PGA
Explanation
$C^{14}$Is an isotope of carbon. It has been used to draw the path of carbon fixation in the process of photosynthesis. This lebelled$C^{14}$ becomes incorporated with ¹⁴CO₂, which is accepted by RuBP and 3 carbon compounds, phosphoglyceric acid (3-PGA) is formed. 3-PGA is the first stable compound.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.