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Question #47481
The Question
In certain Ascomycetes, the dormancy of the fruiting body is regulated by an endogenous signaling molecule functionally analogous to Abscisic Acid (ABA), a plant stress hormone. If a competitive antagonist specific to the fungal receptor of this ABA-like molecule is introduced into the culture medium during a non-conducive season, which of the following physiological outcomes is most likely to be observed?
Options
- A.
The mycelium will fail to undergo plasmogamy, permanently arresting the formation of the dikaryophase.
- B.
Premature morphological differentiation of hyphae will occur, forcing the mass-formation of ascocarps.
- C.
The fungus will shift entirely to asexual reproduction, producing exclusively conidiophores instead of ascocarps.
- D.
The competitive antagonist will mimic the stress signal, further prolonging the dormancy of the ascocarp.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Ascomycetes Sac Fungi|Abscisic Acid (ABA) Antagonism|Differentiation of Stem Cells
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Double Negative Logic in Endocrinology/Signaling.
Students must synthesize NCERT knowledge of ABA (which inhibits growth/promotes dormancy) with the pharmacological concept of a competitive antagonist.
A common misconception is assuming an 'antagonist' will stop growth.
However, antagonizing an inhibitor actually promotes the developmental process, leading to premature ascocarp formation.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Ascomycetes Sac Fungi |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |