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Question #45949
The Question
A researcher treats a rapidly dividing human tissue culture with a highly specific chemical inhibitor that blocks the Anaphase Promoting Complex (APC). Which of the following statements most accurately describes the immediate physiological consequence on the cellular growth and division parameters of this tissue?
Options
- A.
The tissue experiences a complete cessation of both absolute growth (cell number) and relative growth (cytoplasmic mass) as cells arrest in Anaphase.
- B.
The degradation of Securin is prevented, arresting cells in Metaphase, which halts absolute growth (cell number) while relative cytoplasmic growth continues.
- C.
The activation of Separase is accelerated, causing premature sister chromatid separation and an abnormal increase in absolute growth.
- D.
The cells arrest at the G2/M transition due to Cyclin B accumulation, halting both karyokinesis and cytoplasmic hypertrophy.
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
Anaphase Promotion Complex (APC)|Absolute vs Relative Growth
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often conflate 'cell division arrest' with 'total growth arrest'.
This question tests the ability to distinguish between absolute growth (increase in cell number) and relative growth (increase in cell mass/volume).
Furthermore, it acts as a Location/Sequence Trap, requiring the student to precisely locate the APC checkpoint at the Metaphase-Anaphase boundary rather than the G2/M transition.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Growth and Development - Class 11 |
| Concept | Absolute vs Relative Growth |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |