CAS BI 107 Chapter Notes - Chapter 3: Thomas Cech, Cytidine, Uracil
Document Summary
Chapter 3 nucleic acids: definition - a large, chain-like macromolecule containing phosphoric acid, sugar, and a nitrogenous base. 2 examples are deoxyribonucleic acid (dna) & ribonucleic acid (rna: sugar is 5-carbon sugar called a pentose ribose deoxyribose, phosphoric acid is composed of one or more phosphate groups (po4, nitrogenous base = 2 types purine pyrimidine. 6-aminopurine (adenine) 2-amino-6-hydroxypurine (guanine: three common pyrimidine bases, cytosine, thymine, and uracil. Nucleoside - macromolecule composed of a nitrogenous base joined to a pentose. Nucleotide - is a macromolecule composed of a nitrogenous base, a pentose, and linked (esterified) to one or more phosphate groups. Phosphate is linked to the 3" oh of the pentose = 3"-ribo(deoxyribo) - nucleotide. T-deoxyriboside = deoxythymidine u-riboside = uridine: nomenclature of nucleotides in dna base - deoxyribose - phosphate. Nomenclature of nucleotides in rna base - ribose - phosphate.