Selective degradation of single stranded DNA is carried out by the enzyme_________ .

 A. nuclease

B. ribonuclease

C. deoxyribonuclease

D. SI nuclease

Explanation: S1 nuclease is an endonuclease specific for single-stranded DNA or RNA and can be used to study nucleic acid hybridization, mapping RNA start sites and RNA splice sites. This enzyme is five times more active on DNA than RNA, and it will digest all nucleic acids if the enzyme is added to the reaction in excess.

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