In 1963, two enzymes responsible for restricting the growth of bacteriophage in E.Coli were isolated. They were ……….. and ……… respectively.

• A

  Ligase, Restriction endonuclease

• B

  Helicase, Restriction endonuclease

• C

  Methylase, Restriction endonuclease

• D

  DNA polymerase, Restriction endonuclease