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Question #46716
The Question
A novel antibiotic specifically disrupts the structural geometry of mesosomes in a Gram-positive bacterium without inhibiting DNA polymerase activity. Upon observing the bacteria post-binary fission, it is noted that one daughter cell is completely devoid of genomic DNA while the other possesses double the normal genomic content. This outcome indicates the failure of which specific mesosome-mediated process, and what eukaryotic genetic error does this most closely parallel?
Options
- A.
Failure of DNA replication initiation; parallels S-phase arrest in the eukaryotic cell cycle.
- B.
Failure of distribution of replicated DNA to daughter cells; parallels nondisjunction during anaphase.
- C.
Failure of cell wall formation; parallels the absence of phragmoplast formation during plant cytokinesis.
- D.
Failure of respiratory enzyme localization; parallels the disruption of the mitochondrial inner membrane.
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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
Prokaryotic Mesosome Geometry|DNA Polymerase Directionality|Centromere Positionality
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often heavily associate mesosomes only with respiration (analogous to mitochondria) and overlook their critical mechanical role in 'DNA distribution to daughter cells' mentioned in NCERT.
The question tests the ability to link a prokaryotic structural defect (mesosomal attachment failure) to its functional consequence, and then draw an analytical analogy to a eukaryotic chromosomal disorder (nondisjunction/aneuploidy).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Cell – The Unit of Life - Class 11 |
| Concept | Prokaryotic Mesosome Geometry |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |