What is the Function of the Basement Membrane. 19 Jul, 2012 what is 0. The Basement membrane is a layer of fiber that is located under epithelium or endothelium. The epithelium is the tissue that lines the surfaces and cavities of organs, whereas the endothelium lines the inside of blood vessels.hat is the Function of the Basement Membrane. 19 Jul, 2012 what is 0. The Basement membrane is a layer of fiber that is located under epithelium or endothelium. The epithelium is the tissue that lines the surfaces and cavities of organs, whereas the endothelium lines the inside of blood vessels.
DNA Polymerase is the enzyme which adds new nucleotides during  replication.
DNA polymerase 1, 2, 3 are in E Coli. Synthesize new strand 5' to 3', read template 3' to 5', exonuclease activity (proofreads). DNA polymerase 3 is a replication enzyme, moves along DNA strad with motor. Proofreads - checks for and corrects mistakes from outside the nucleus. Incorrect nucleotide is removed and then correct nucleotide is brought in.