BIOL 2153 Study Guide - Midterm Guide: Mitochondrion, Cytosine, Guanine
Document Summary
Watson & crick"s double helix: dna is a double helix of two nucleotide strands (sugar/phosphate backbone, complementary base pairs hold the two dna strands together, hydrogen bonds form between complementary bases, nucleoside = only base and sugar, nulceotide = base sugar and phosphate, two nucleotides are held together by a phosphodiester bond, numbering scheme: numbers correlate with carbons, primes denote carbons in the sugar. Rna splicing: remove introns, alternative splicing sometimes one mrna can have multiple termination signals which makes different length mature rna, step 1, step 2: Aminoacyl trna synthetases growing polypeptide brought within close: takes specific amino acid and stocks it full of energy (atp) to form the amino acid + 1 phosphate which allows it to be bound to a trna molecule, once combined you get charged trna, contain 4 small nuclear ribonucleoproteins (snrnps; snurps ), which contain snrnas that aid in binding the.
