Question

Restriction endonuclease-

• A. cuts the DNA molecule randomly
• B. cuts the DNA molecule at specific sites
• C. restricts the synthesis of DNA inside the nucleus
• D. synthesizes DNA

Answer 1

Answer: (C)

Restriction endonuclease is a type of enzyme that can cleave molecules of DNA at a particular site called restriction site having polindromic sequence. These enzymes are produced by many bacteria and protect the cell by cleaving and destroying the DNA of invading viruses. Now a days, restriction enzymes are widely used in the techniques of genetic engineering.