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Question #45808
The Question
The principle that 'growth and reproduction are mutually exclusive events in higher animals' is perfectly exemplified during human oogenesis. Which of the following statements regarding the growth phase and meiotic arrest of the primary oocyte is INCORRECT?
Options
- A.
The primary oocyte undergoes massive cytoplasmic expansion while its nuclear cycle is suspended in the diplotene stage of Prophase I.
- B.
This decoupling of metabolic growth from cell division contrasts with unicellular organisms, where cellular growth and reproduction are synonymous.
- C.
During this prolonged growth phase prior to puberty, the primary oocyte maintains a diploid chromosome number (2n) with a DNA content of 2C.
- D.
The extensive cytoplasmic accumulation during this meiotic arrest is crucial for providing nutrients and organelles for early post-fertilization cleavage.
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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
Sertoli Cell Functions|Meiotic Arrest|Defining Properties Criteria
Why This Question Is Tricky
Common Mistakes
The Conceptual Pivot relies on the 'Quantitative Nuance' of the cell cycle during meiotic arrest.
Students often assume that a cell in a prolonged 'resting' or 'arrested' phase prior to puberty has a baseline DNA content (2C).
However, because the primary oocyte is arrested in Prophase I (which occurs after the S phase), its DNA has already replicated, resulting in a 4C DNA content despite being diploid (2n).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Defining Properties Criteria |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |