Before You Begin
Question #46828
The Question
A mutation in a mature woody dicot plant severely impairs the fatty-acid biosynthesis pathway, specifically inhibiting the oxidative polymerization of long-chain lipid precursors. Consequently, the plant suffers from massive water loss through its bark and complete reproductive failure due to environmental degradation of its microspores. Which two specific biochemical barriers are simultaneously compromised by this mutation?
Options
- A.
Sporopollenin in the exine and suberin in the phellem
- B.
Pectocellulose in the intine and lignin in the phelloderm
- C.
Callose in the pollen tetrad and cutin in the epidermis
- D.
Sporopollenin in the tapetum and suberin in the phellogen
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Sporopollenin|Phellogen|Cutin|Suberin
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students typically memorize plant anatomy (suberin in cork) and reproduction (sporopollenin in exine) in isolated silos.
This question tests the ability to synthesize NCERT facts by recognizing the shared biochemical origin (lipid/fatty-acid derivatives) of these two highly resistant biological polymers.
It also relies on precise location specificity, trapping students who confuse the layers of the periderm (phellem vs. phellogen vs. phelloderm).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Anatomy of Flowering Plants - Class 11 |
| Concept | Periderm Components |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |