LIFE SCIENCE

Detailed explanation-1: -Restriction endonuclease enzymes are also known as molecular scissors or biological scissors or chemical knives or chemical scalpels. So, the correct answer is ‘Endonucleases’.

Detailed explanation-2: -Restriction enzyme cuts the DNA double helix in a very precise way. It cleaves DNA into fragments at or near specific recognition sites within the molecule known as restriction sites. Hence, restriction enzyme is also called as ‘molecular scissor’ or ‘knife of DNA’.

Detailed explanation-3: -a segment of genetic material that inhibits the reproduction of the AIDS virus by breaking up specific areas of the virus’s genes.

Detailed explanation-4: -c) Endonucleases enzymes cut DNA at specific desired place so it is called chemical knives of DNA.

Detailed explanation-5: -Restriction endonucleases acts as a knife for the DNA. A restriction enzyme (or restriction endonuclease) is an enzyme that cuts DNA at or near specific recognition nucleotide sequences known as restriction sites.