Dna Rna

Friday, August 19, 2011

What is DNA Polymerase

DNA polymerase is an enzyme that catalyzes the polymerization of deoxyribonucleotides into a DNA strand. DNA polymerases are best-known for their role in DNA replication, in which the polymerase “reads” an intact DNA strand as a template and uses it...

DNA Evolution

DNA contains the genetic information that allows all modern living things to function, grow and reproduce. However, it is unclear how long in the 4-billion-year history of life DNA has performed this function, as it has been proposed that the earliest...

Thursday, August 18, 2011

DNA Polymerase Function

DNA polymerase function is can add free nucleotides to only the 3′ end of the newly-forming strand. This results in elongation of the new strand in a 5′-3′ direction. No known DNA polymerase is able to begin a new chain (de novo). DNA polymerase can...

DNA Polymerase

DNA polymerases are a family of enzymes that carry out all forms of DNA replication. However, a DNA polymerase can only extend an existing DNA strand paired with a template strand; it cannot begin the synthesis of a new strand. To begin synthesis, a...

Wednesday, August 17, 2011

DNA Model

Deoxyribonucleic acid (DNA) is a molecule that contains all the information to determine who you are and what you look like. The chemical compound that makes up DNA was first discovered by Friedrich Miescher in Germany around 1869. In 1953, Francis...

Function of DNA

DNA is found primarily in the nucleus of a cell in strands of genetic material called chromosomes. Each chromosome is a single piece of double stranded DNA; specific areas of the chromosome that are responsible for particular body functions are called...

Monday, August 15, 2011

DNA Isolation

DNA isolation is a routine procedure to collect DNA for subsequent molecular or forensic analysis. There are three basic and one optional steps in a DNA extraction: Breaking the cells open, commonly referred to as cell disruption or cell lysis, to...