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Question #46983
The Question
During an experiment on Agaricus, a chemical agent is introduced that specifically inhibits karyogamy. Assuming all other cellular processes remain functional, which of the following represents the most accurate consequence of this inhibition on the fungal life cycle?
Options
- A.
The basidium will fail to form a diploid nucleus, permanently arresting the cycle in the dikaryophase and preventing exogenous basidiospore formation.
- B.
The secondary mycelium will revert to a monokaryotic state due to the failure of reduction division within the basidiocarp.
- C.
The fungus will successfully form a basidiocarp, but the basidia will undergo mitosis to produce diploid basidiospores instead of haploid ones.
- D.
Plasmogamy will be indirectly inhibited, preventing the initial fusion of somatic cells from two different mating types.
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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
Fungal Wall Chemistry|Agrobacterium Tumefaciens Mechanism|Restriction Endonuclease Nomenclature
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse the ploidy of the fungal fruiting body.
The basidiocarp is dikaryotic (n+n), not diploid (2n).
Therefore, inhibiting karyogamy does not necessarily prevent the formation of the dikaryotic mycelium or basidiocarp, but it strictly traps the organism in the dikaryophase, preventing the formation of the transient diploid zygote and subsequent meiotic basidiospores.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Fungal Wall Chemistry |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |