How Do Bacteria Avoid Destroying Their Own DNA with Their

question 13

Multiple Choice

How do bacteria avoid destroying their own DNA with their restriction endonucleases?

• A) Bacterial restriction endonucleases only affect virus and eukaryotic DNA and do not affect bacterial DNA
• B) Bacteria do not have the recognition sequences for their own restriction endonucleases in their genome.
• C) Restriction endonucleases cannot penetrate the bacterial nuclear membrane
• D) Bacteria methylate restriction endonuclease recognition sites in their own genome

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