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How many classes of restriction enzymes are there?

(a) 2

(b) 1

(c) 3

(d) 4

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My query is from Restriction Endonuclease & Phosphatases in division Basics of Genetic Engineering of Genetic Engineering

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Best answer
The correct choice is (c) 3

Explanation: Three classes of restriction enzymes are there, I, II and III. These classes are having different characteristics such as the site of cleavage on the basis of the recognition sequence.

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