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Question:

Which of the following is a restriction endonuclease?

Protease

DNase I

Hind II

RNase

Solution:

Restriction enzymes are traditionally classified into four types on the basis of subunit composition, cleavage position, sequence specificity and cofactor requirements. There are four classes of restriction endonucleases: types I, II, III and IV. HindII is a type II restriction enzyme found in Haemophilus influenzae.