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Question #46213
The Question
If a targeted chemical inhibitor specifically and permanently destroys the cells residing in the G0 phase within the root apical meristem of a dicot plant, which of the following physiological cascades will most likely occur?
Options
- A.
The zone of elongation will immediately arrest, preventing the formation of root hairs in the maturation zone.
- B.
The root will lose its ability to navigate the soil matrix due to the failure to replenish amyloplast-containing columella cells.
- C.
The protoderm will fail to differentiate, leading to the loss of the Casparian strip in the endodermis.
- D.
The actively dividing meristematic cells will undergo rapid endoreduplication to compensate for the loss of the quiescent center.
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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
Quiescent Center|Root Apical Meristem|Root Cap
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: This question requires integrating cell cycle phases (G0) with plant histology (Quiescent Centre) and physiological responses (gravitropism via amyloplasts).
The common misconception is treating the Quiescent Centre merely as a 'slow-dividing zone' without recognizing its critical role as the ultimate stem cell niche required to replenish the root cap, which is the actual site of gravity perception.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Root Region Differentiation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |