There are DNA polymerases and RNA polymerases. DNA sequencing is the process of determining the sequence of nucleotides within a DNA molecule.Every organism’s DNA consists of a unique sequence of nucleotides. DNA polymerases are those that are involved in template-directed synthesis of DNA from deoxyribonucleotide triphosphates. In the laboratory, the strength of this interaction can be measured by finding the temperature necessary to break half of the hydrogen bonds, their melting temperature (also called T m value). DNA Replication DNA replication is the first step in both mitosis and meiosis. DNA definition: 1. deoxyribonucleic acid: the chemical, present at the centre of the cells of living things, that…. Other proteins are also involved for initiation of the process and copying of DNA, along with proofreading capabilities to ensure the replication process takes place accurately. More Biology Subjects. DNA was first isolated and identified by Swiss biologist Friedrich Meischer in 1869. The DNA is stored as chromosomes inside of the chromosomes. DNA Sequencing Definition. Learn more. In biology, parts of the DNA double helix that need to separate easily, such as the TATAAT Pribnow box in some promoters, tend to have a high AT content, making the strands easier to pull apart. • specific base pairing. Definition noun, plural: DNA polymerases (molecular biology) An enzyme assisting in DNA replication Supplement Polymerases are enzymes that assist in synthesizing long chains of nucleic acids. In order to tightly coil the DNA to fit in the nucleus as chromosomes, the DNA is tightly wound around proteins called histones. DNA is necessary for the production of proteins, the regulation, metabolism, and reproduction of the cell. DNAin Eukaryotic DNA. Activities Take a ten question quiz about this page. DNA Definition Deoxyribonucleic acid, or DNA, is a biological macromolecule that carries hereditary information in many organisms. • two sugar-phosphate backbones held together by hydrogen bonds between base pairs. This complex on DNA wrapped around a histone is called a nucleosome. Chromosomes in eukaryotic cells are linear in shape. Determining the sequence can help scientists compare DNA between organisms, which can help show how the organisms are related. Structure of DNA The double-helix structure of DNA, enabling it to act as a stable information-carrying molecule, in terms of • the components of DNA nucleotides: deoxyribose, phosphate and the bases adenine, cytosine, guanine and thymine. DNA replication process uses DNA polymerase as the main enzyme for catalyzing the joining of deoxyribonucleoside 5′-triphosphates (dNTPs) forming a growing chain of DNA. A Level: Biology. DNA synonyms, DNA pronunciation, DNA translation, English dictionary definition of DNA.