Q. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
A) Cellulose
B) Cuticle
C) Sporopollenin
D) Lignin
Explanation
[Solution from source] Sporopollenin in the exine of pollen grains is one of the most resistant organic materials; it withstands high temperatures and strong acids and alkalis, and no known enzyme degrades it. Lignin and cellulose are both broken down by microbial enzymes. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.