NEET 2010 Biology question

Restriction endonucleases are enzymes which

(1)Recognize a specific nucleotide sequence for binding of DNA ligase
(2)Restrict the action of the enzyme DNA polymerase
(3)Remove nucleotides from the ends of the DNA molecule
(4)Make cuts at specific positions within the DNA moleculeCorrect

Answer: (4)

Solution

Restriction endonucleases (molecular scissors) recognise specific palindromic nucleotide sequences in DNA and cut the DNA at specific positions within the molecule, away from the ends. So (4) is

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Question ID VK-090633