01:119:115 Lecture 15: Lecture 15

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Professor Cardinale

Document Summary

D. characteristics of the genetic code: unambiguous- each codon codes for just 1 aa. E. characteristics of the genetic code: degenerate- most aas called by >1 codon (figure. 17. 5: proline codes for four codons, the four codons are called codon family or synonymous codons. F. start codon: only one, always aug, codes for methionine, it always marks the beginning of translation for ribosome, methionine always first aa, but it is often removed. G. 3 stop codons: uaa, uag, uga, do not code for aa, trigger translation termination. A. introduction: first part of gene expression, synthesis of rna that is complementary to dna, three stages (important: figure 17. 7), initiation, elongation, termination. C. elongation (figure 17. 6: rna synthesis, anti-parallel to template strand, rna nucleoside triphosphates are substrates, just like in dna synthesis. D. termination (figure 17. 6: specific dna sequence signals rna polymerase to stop, rna transcript dissociates from dna template, can be helped by a protein, but does not have to be.