Located near the center of the US population, Northwest Arkansas is, quite simply, in the middle of everywhere. There are several Midwestern markets within a half-day's drive, including Kansas City, St. Louis, Dallas-Fort Worth, Little Rock, Tulsa, and Oklahoma City.
Restriction enzyme. A restriction enzyme or restriction endonuclease is an enzyme that cuts DNA at or near specific recognition nucleotide sequences known as restriction sites.
Report Abuse. b) to cleave nucleic acids at specific sites Bacteria contain restriction enzymes as a defense against viruses. The restriction enzymes cut up the nucleic acids or the genetic material of viruses so they will be unable to integrate themselves within the bacterial DNA.Restrition enzymes are also used to insert different genes into plasmid vectors so that those specific genes may be reproduced for experimental needs. to join nucleotides during transcription b to cleave nucleic acids at specific sites c to add new nucleotides to the growing strand of DNA d to join nucleotides during replication e to repair breaks in sugar-phosphate backbones.