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Question #46750
The Question
A researcher treats a dividing mammalian cell culture with a highly specific chemical inhibitor of the Anaphase Promoting Complex (APC). Based on the principles of cell cycle regulation and the endosymbiotic theory, which of the following best describes the cellular state after a prolonged period of this inhibition?
Options
- A.
The cell arrests at the metaphase plate with intact cohesin proteins, and mitochondrial biogenesis is simultaneously halted due to the M-checkpoint.
- B.
The cell arrests at the metaphase-anaphase transition with intact cohesin, while mitochondria continue to divide via fission, leading to an abnormally high organelle density.
- C.
The cell undergoes premature anaphase due to securin degradation, but mitochondrial replication ceases, causing metabolic instability.
- D.
The cell arrests in the G2 phase, preventing both nuclear envelope breakdown and the independent replication of endosymbiotic organelles.
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
Mitochondria|Anaphase Promotion Complex (APC)|Microtubule Dynamic Instability
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often assume that a 'cell cycle arrest' freezes the entire cell, including all its organelles.
This question tests the synthesis of two distinct NCERT concepts: the specific function of the APC in the nuclear cell cycle, and the semi-autonomous nature of mitochondria (endosymbiotic theory).
The trap is falsely linking nuclear checkpoints to mitochondrial fission.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Cell – The Unit of Life - Class 11 |
| Concept | Mitochondrial Endosymbiotic Evidence |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |