Another recent trend is the demonization of people of Hispanic descent in North America by some US politicians as somehow not being as deserving of an equal right to domicile as their northern-European descended cousins.his sometimes requires the use of otherism beforehand, to make people view the targeted group as an other.. One of the most long-standing ongoing examples of demonization is anti-Semitism, but lately there has been an increase in the West of virulent anti-Muslim sentiment.
Restriction enzyme: An enzyme from bacteria that can recognize specific base sequences in DNA and cut the DNA at that site (the restriction site). A restriction enzyme acts as a biochemical scissors. Also called a restriction endonuclease. A restriction enzyme is a protein produced by bacteria that cleaves DNA at specific sites. Bacteria use restriction enzymes to defend against bacterial viruses called bacteriophages (or phage). When a phage infects a bacteria, it inserts its DNA into the bacteria so that it might be replicated.
Cutting and Splicing DNA Molecules. If you want to insert a piece of new DNA (foreign DNA) into an existing strand you'd have to cut the existing strand, somehow position the foreign DNA, and then join the strands. This joining is called ligation and can be done with the enzyme DNA ligase. Restriction enzymes are produced by bacteria and function to protect bacteria from foreign DNA (like viruses). Restriction enzymes work by degrading foreign DNA. Restriction enzymes recognize and cut the sugar phosphate backbone of the DNA molecule at specific sites on a strand of DNA. The restriction enzyme recognition site is determined by a specific sequence of nucleotides. Thousands of restriction enzymes have been isolated, although many share the same recognition sequence.