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Question #46289
The Question
In an experimental model, a targeted genetic mutation disrupts the protein complexes responsible for maintaining tight junctions in the columnar epithelium of the small intestine. Which of the following represents the primary cellular consequence of this mutation, and which plant developmental process does this loss of structural identity most closely parallel?
Options
- A.
Loss of apical-basal polarity and secretory asymmetry; parallels dedifferentiation.
- B.
Failure of rapid intercellular communication and ion exchange; parallels redifferentiation.
- C.
Inability to cement neighboring cells together leading to tissue tearing; parallels the maturation of sclerenchyma.
- D.
Immediate arrest of the cell cycle in the G0 phase; parallels the formation of primary meristems.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Meristematic Polarity|Epithelial Junctions Polarity|Apical-Basal Axis
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize tight junctions strictly as 'leakage preventers' (direct NCERT line) but fail to synthesize their critical role in maintaining membrane architecture and cell polarity.
The question forces a cross-kingdom synthesis, requiring the student to equate the loss of specialized epithelial polarity in animals with the concept of 'dedifferentiation' (loss of specialized identity) in plants.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Anatomy of Flowering Plants - Class 11 |
| Concept | Meristematic Polarity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |