Q.46
Fish Physiology and Biochemistry- ICAR JRF/SRF 2024
MCQ (Single Correct)
+4
−1
bacterium methylates its DNA to-
- Bacterial Restriction-Modification (R-M) System:
- Bacteria synthesize sequence-specific DNA methyltransferases that add methyl groups ($-CH_3$) to adenine or cytosine bases within their own genomic recognition motifs.
- This methylation prevents host restriction endonucleases from binding and cleaving the bacterial chromosome, protecting host genomic DNA from degradation by its own restriction enzymes while degrading unmethylated foreign bacteriophage DNA.
- Correct Option: Option 4 (Protect DNA from its own restriction enzymes).
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
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