Question
Biology Question on Nutrition
In which one of the following nitrogen is not a constituent:
A
Idioblast
B
Bacteriochlorophyll
C
Invertase
D
Pepsin
Answer
Idioblast
Explanation
Solution
Idioblasts, as isolated plant cells with various functions like storage of reserves, pigments, and minerals, may not necessarily contain nitrogen, and the other options indeed involve proteins/enzymes that contain nitrogen.
Therefore, the correct answer is (A): Idioblast