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What is the function of loxP sites?

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What is the function of loxP sites?

(a) It is responsible for linearization of DNA in the host bacterium

(b) It is responsible for circularization of DNA in the host bacterium

(c) It is responsible for conversion of single stranded DNA into double stranded DNA

(d) It is responsible for conversion of double stranded DNA into single stranded DNA

I got this question in semester exam.

The doubt is from Bacteriophage-Mu and Bacteriophage-Pi topic in portion Other Vector Systems for E of Genetic Engineering

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Correct option is (b) It is responsible for circularization of DNA in the host bacterium

For explanation I would say: The lox P sites are responsible for the circularization of the linear DNA molecules in the host bacterium.

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