Question

$\huge\rm\underline\purple{Question :-}$

How many types of restriction nucleases are found. Why they are called as molecular scissors?


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Answer 1

These enzymes make a single incision on each of the two DNA strands and are also called restriction endonucleases. These molecular scissors are called Restriction enzymes or DNA scissors

Explanation:

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Answer 2

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Restriction enzymes are also called 'molecular scissors' as they cleave DNA at or near specific recognition sequences known as restriction sites. These enzymes make one incision on each of the two strands of DNA and are also called restriction endonucleases.