Ques. Restriction endonucleases
A. are present in mammalian cells for degradation of DNA when the cell dies
B. are used in genetic engineering for ligating two DNA molecules
C. are used for in vitro DNA synthesis
D. are synthesized by bacteria as part of their defense mechanism.
Answer:D
Ques. Restriction endonucleases
A. are present in mammalian cells for degradation of DNA when the cell dies B. are used in genetic engineering for ligating two DNA molecules C. are used for in vitro DNA synthesis D. are synthesized by bacteria as part of their defense mechanism.