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Question #45232
The Question
In an experiment, ciliated eukaryotic cells are subjected to a chemical agent that specifically depletes cholesterol from the plasma membrane. Which of the following statements correctly predicts the primary structural and functional outcome for the cilia?
Options
- A.
The 9+2 microtubular axoneme undergoes rapid depolymerization, resulting in the complete loss of ciliary motility.
- B.
The basal body loses its stable anchorage to the plasma membrane, preventing effective motility, though the internal 9+2 microtubular scaffold remains intact.
- C.
The plasma membrane extension covering the cilium loses its differential permeability, causing the central singlet microtubules to fuse.
- D.
The synthesis of tubulin proteins at the basal body is inhibited, preventing the formation of new peripheral doublet microtubules.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Lipid Amphipathic Nature|Ciliary/Flagellar Ultrastructure|Axoneme
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between the lipid-based plasma membrane micro-environment (which anchors the organelle) and the protein-based cytoskeletal architecture (the 9+2 axoneme).
A common misconception is that disrupting the outer membrane's lipid composition directly and immediately depolymerizes the internal proteinaceous microtubule scaffold.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biomolecules - Class 11 |
| Concept | Lipid Amphipathic Nature |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |