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Restriction endonuclease...

Restriction endonuclease

A

cuts the DNA molecule randomly

B

cuts the DNA molecule at specific sites

C

restricts the synthesis of DNA inside the nucleus

D

synthesizes DNA

Text Solution

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The correct Answer is:
B
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Read the given statements and select the correct option, Statement 1 : Restriction endonuclease enzymes recognise a specific palindromic nucleotide sequence in the DNA Statement 2: Restriction endonuclease enzymes are called as molecular scissors or biological scissors.

Assertion (A) : Restriction endonucleases recognise short pallindromic sequence and cut at specific sites Reason (R) : When a restriction endonuclease acts on a pallindrome, it cleaves both the strands of DNA molecule.

Select the correct option regarding restriction endonuclease P. 900 restriction enzyme have been isolated from over 200 strains. Q. The first restriction exonuclease was Hind II. R. Each restriction endonuclease recognises same palindromic sequence .