Question:
CRISPR-Cas system is associated with:
CRISPR-Cas system is associated with:
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CRISPR works like a genetic memory system: it stores past viral sequences, making it a type of adaptive immunity in bacteria.
Updated On: Jan 2, 2026
- adaptive immunity in eukaryotes
- adaptive immunity in prokaryotes
- innate immunity in eukaryotes
- innate immunity in prokaryotes
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The Correct Option is B
Solution and Explanation
The CRISPR-Cas system is found in bacteria and archaea and functions as a molecular immune system.
Step 1: Mechanism.
It stores fragments of viral DNA as spacers. When the virus attacks again, CRISPR RNA guides Cas proteins to destroy the viral genome.
Step 2: Immunity classification.
Because the system "remembers" previous viral infections, it is a form of adaptive immunity, not innate immunity.
Since bacteria are prokaryotes, it corresponds to adaptive immunity in prokaryotes.
Step 3: Conclusion.
Correct option is (B).
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