Q. In which one of the following nitrogen is not a constituent?
A) Invertase
B) Pepsin
C) Idioblast
D) Bacteriochlorophyll
Explanation
Idioblast seems to the most appropriate choice. Invertaseand pepsin are enzyme proteins (contain nitrogen) and bacteriochlorophyll also contains nitrogen. Idioblasts are cells having crystals of calcium oxalate, called raphides.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.