Question

Why the enzymes that cut DNA are named as restriction enzymes? How these enzymes restrict growth of bacteriophage in Escherichiacoli?

Answer 1

The restriction enzymes are called so because they cut the DNA at specific locations called restriction sites.
The restriction enzymes present in E. coli cut the DNA of bacteriophage into fragments and render them inactive to protect themselves from any harm. Thus, restrict their growth and multiplication inside the host cell.