Restriction enzymes are used in genetic engineering because they
A. can cut DNA at specific base sequence
B. are proteolytic enzymes which can degrade harmful proteins
C. are nucleases that cut DNA at variable sites
D. can join different DNA fragments
Answer:A
Restriction enzymes are used in genetic engineering because they
A. can cut DNA at specific base sequence B. are proteolytic enzymes which can degrade harmful proteins C. are nucleases that cut DNA at variable sites D. can join different DNA fragments