BacterialGeneticssl - Bacterial Genetics Review Genome...

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Bacterial Genetics
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Review Genome: entire genetic material Gene: functional unit of genetic info DNA or RNA (nucleic acids) Nucleotides: sugar, phosphate & nitrogenous base Guanine-G; cytosine-C; adenine-A; thymine-T In RNA uracil-U replaces thymine
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Review DNA –ds helix Stands held together by H bonds between the bases Complimentary base pairing Genetic code for amino acids
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Duplication of DNA Replication of chromosome(s) Due to complementary base pair structure DNA polymerase Result- 2 ds helices Denaturation: separate strands
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Terms Genotype: Phenotype: Genome of prokaryotes
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Flow of Information DNA to RNA to polypeptides RNA polymerase binds at promoter site Separates strands of DNA Copies only DNA needed for protein synthesis
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Flow of Information Translation: protein synthesis Decodes sequence of nucleotides into amino acids Genetic Code: Ribosomes-site of protein synthsis tRNA carries the amino acid
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Flow of Information Translation
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Regulation of Gene Expression Prokaryotes Eukaryotes
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Regulation of Gene Expression Conserve energy Repression Operon-model in bacteria
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Induction Turn on the transcription of gene Inducer- induces transcription Inducible enzymes Constitutive genes not regulated
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  • Spring '08
  • AngelaKatenkamp
  • DNA, Amino Acids, DNA ­ds helix, DNA Spontaneous mutations

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