Cut dna into small fragments.
restriction enzymes
nucleic acids
nucleotides
none of the above

None of these answers would answer your question, that's sorta redundant ain't it? 

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.