last lecture - • E site o Exit • P site o Peptidel • A site o Amino acid • Spliced o Excised o Removed • mRNA o Soecufues the amino acid

• The base uracil substitutes for thymine during base pairing • Uracil is a pyrimidine and base-pairs with adenine (purine) • Purine o Adenyne o Guaynine • Transcription o The production of messenger RNA • DNA templates o Sense, 5’ c g a 3’ o CDNA 3’ g c t 5’  Replication o mRNA 5’ c g a 3’  transcription o tRNA 3’ g c u 5’  translation o protein • AUG – methionine – start codon • UAG, UAA, UGA – stop codon • DNA helicase – dna being unwound • Topoisomers o Stop from knotting • Translation requires ribosomes • Upstream o Towards the 5’ to 3’ • Downstream o Towards the 3’ to 5’ • Promoters • Leader sequence o Tells ribosome where to bind • Ribosomes pair tRNA anitcodon and mRNA codon

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Unformatted text preview: • E site o Exit • P site o Peptidel • A site o Amino acid • Spliced o Excised o Removed • mRNA o Soecufues the amino acid sequence of a protein • tRNA o Adapter molecule • rRNA o Structural and catalytic roles in ribosomes • Genes o A gene is a nucleotide sequence that carries info to rRNA • Mutations o Chromosomal o Point mutations Base substitution without effect Missense nonsense o Frameshift ( changes in 1 or 2 bases) changes the way the nucleotides are read • http://www3.fhs.usyd.edu.au/bio//proteinsynthesis/introduction.htm •...
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