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Question #46964
The Question
Dinoflagellates exhibit a unique nuclear organization known as a 'dinokaryon'. Considering their evolutionary peculiarities and interactions with infectious agents, which of the following statements is INCORRECT?
Options
- A.
Their chromosomes are permanently condensed in a liquid-crystalline state and lack standard histone-based nucleosomes.
- B.
The absence of typical histone packaging in their nucleus makes their genome highly susceptible to horizontal gene transfer.
- C.
Viroids, which are infectious naked RNA molecules, integrate into the dinoflagellate genome by utilizing the host's abundant H1 linker histones.
- D.
Despite being classified under Kingdom Protista as eukaryotes, their chromatin lacks the typical 'beads-on-a-string' appearance.
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
Ciliary/Flagellar Ultrastructure|Dinoflagellate Bioluminescence and Toxins
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often blindly associate all eukaryotes with standard histone packaging (nucleosomes).
The trap exploits this by suggesting viroids interact with the host's 'abundant H1 linker histones'.
A student must synthesize the NCERT fact that dinoflagellates are an evolutionary exception lacking typical histones, combined with the structural reality of viroids.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Dinoflagellate Bioluminescence and Toxins |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |