Restriction endonucleases are
A. Used in genetic engineering for uniting two DNA molecules
B. Used for in vitro DNA synthesis
C. Present in mammalian cells for degeneration of DNA of dead cells
D. Synthesised by bacteria for their defence
Answer:D
Restriction endonucleases are
A. Used in genetic engineering for uniting two DNA molecules B. Used for in vitro DNA synthesis C. Present in mammalian cells for degeneration of DNA of dead cells D. Synthesised by bacteria for their defence