AP BIOLOGY

Detailed explanation-1: -Introduction. Restriction enzymes are also called “molecular scissors” as they cleave DNA at or near specific recognition sequences known as restriction sites. These enzymes make one incision on each of the two strands of DNA and are also called restriction endonucleases.

Detailed explanation-2: -(a)DNA ligase. (a)helicase. Hint: Biologic scissors are named because they bind (cut) DNA to or close particular detection sequences (restriction sites). They function as an important tool for gene alteration and are commonly used in transformation, transfection, etc.

Detailed explanation-3: -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.

Detailed explanation-4: -Restriction endonucleases are the restriction enzymes that cleave the DNA at specific sites so they are known as molecular scissors. Was this answer helpful?

Detailed explanation-5: -restriction enzyme, also called restriction endonuclease, a protein produced by bacteria that cleaves DNA at specific sites along the molecule. In the bacterial cell, restriction enzymes cleave foreign DNA, thus eliminating infecting organisms.