BIOCHEM 2EE3 Study Guide - Final Guide: Glycosidic Bond, Alpha And Beta Carbon, Glutamic Acid

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Dna is double-stranded and has a, t, g, c. Rna is single stranded and has a, u, g, c nucleobases split into 2 categories: purines - a and g pyrimidines - c, t, u. G and c make 3 hydrogen bonds w each other. A, t and u make 2 hydrogen bonds w each other. Polynucleotides phosphodiester linkage/bond bw 3" oh and 5" phosphate. Coupled reaction: joining thermodynamically unfavourable reaction with a favourable one. Dna helix held together via covalent interactions that occur via dntp reactions helix formed bc of h-bonding between nucleobases nucleoside - contains no phosphate - had -oh instead. Amino acid backbone structure amino acid is amine and carboxylic acid attached to an alpha carbon. L-chirality means rotates polarized light to left - only form that occurs in cells glycine only achiral molecule energy to form polypeptides derived from atp. Aliphatic - non polar/hydrophobic, increases with increasing number of carbons.

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