EUKARYOTIC RNA POLYMERASES Based on their elution order from ion-exchange chromatography purification, the eukaryotic RNA polymerases were given the names I, II, and II. They can also be distinguished by their a-amanitin and related amatoxin-family mushroom poison sensitivity. RNA Pol has a core promoter and an upstream promoter element (UPE). RNA Pol is the most studied RNA polymerase and transcribes DNA into precursors mRNA, while RNA Pol has been observed to use both upstream and internal promoters.
Nucleotides
It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Nucleic Acids
Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.
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