BIOL308 Lecture 4: Lecture 4 notes
11 May 2017
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Document Summary
Adds aas to peptide chain by interpreting mrna information during translation. Combines with proteins to aid trna during translation. Enzymatic functions of splicing and peptide formation during protein synthesis. Rna silencing and post transcriptional regulation of gene expression. Confined to nucleus, splicing and other rna processing reactions. Present in cytoplasm/rer to help proteins with selection and transport of other proteins mi sn sc sno guide chemical modifications of other rna v si. Single stranded and can replicate a copy through reverse transcription. Stretches of rna which don"t code for anything but have regulatory function. Primary: sugar po4 chain with purine and pyrimidines bases as side chains. Tertiary: double helix of stacked h bonded bases with. B dna is overwound more than once every. Supercoiling: happens in dna molecules with 2 fixed ends or if it"s circular. 1: twisting: the crossing of one dsdna strand over the other that measures hot tightly the helix is wound.
