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Question

The enzyme which can cut molecules of DNA into segments is known as

A
DNA polymerase
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B
DNA ligase
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C
Restriction enzyme
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D
DNA gyrase
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Solution

The correct option is C Restriction enzyme
The enzyme which can cut molecules of DNA into segments is known as restriction enzyme. Restriction enzymes are also known as molecular scissors. It is a very important tool for recombinant DNA technology. Restriction enzyme was isolated in the year 1963 from the E. coli. Restriction enzymes belong to a larger class of enzymes called Nucleases. They cut DNA at special pelindromic sequence. Restriction enzymes are of two types - Restriction endonuclease and Restriction exonuclease.

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