AP BIOLOGY

Detailed explanation-1: -A restriction enzyme is a protein isolated from bacteria that cleaves DNA sequences at sequence-specific sites, producing DNA fragments with a known sequence at each end. The use of restriction enzymes is critical to certain laboratory methods, including recombinant DNA technology and genetic engineering.

Detailed explanation-2: -Since the early research of Arber, Smith, and others, scientists have isolated more than 800 different restriction enzymes from bacteria, which altogether recognize and cut more than 100 different restriction sites.

Detailed explanation-3: -Restriction enzymes are isolated from the bacteria that manufactures them also. They protect the bacteria from the attacking virus (bacteriophage).

Detailed explanation-4: -DNA polymerase enzyme is isolated from which bacteria? Q.

Detailed explanation-5: -Where do restriction enzymes come from? Restriction enzymes are found in bacteria. Bacteria use restriction enzymes to kill viruses – the enzymes attack the viral DNA and break it into useless fragments.