NORTH BIOL& 260 - Microbial Genetics: DNA and RNA (22 pages)

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Microbial Genetics: DNA and RNA



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Microbial Genetics: DNA and RNA

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Pages:
22
School:
North Seattle College
Course:
Biol& 260 - Microbiology

Unformatted text preview:

Microbial Genetics DNA and RNA What chemical carries the genetic instructions in cells and how is this chemical reproduced How is this chemical used inside the cell to direct the production of new molecules The Need for Protein Making Instructions Phenotype genotype environment 1 chromosome gene 1 protein DNA RNA copy protein production Structure of DNA The Genetic Material Two polynucleotide strands with H bonds RNA is single stranded difft sugar uracil How DNA copies itself when a cell divides DNA replication by unzipping DNA polymerase enzyme synthesizes new complementary strands 2 new helices Transcription Making a short DNA copy DNA protein make up a chromosome RNA polymerase makes RNA from DNA Only one set of instructions gene is copied Copy is complementary to the DNA gene In eukaryotes the RNA copy is edited The Three Kinds of RNA mRNA carries instructions for 1 protein rRNA structural support in ribosomes tRNA amino acid trucks with anticodons Steps of Translation Protein Synthesis DNA the genetic material replicates by semiconservative replication It is further copied in transcription for use in building proteins for the cell Flow of Genetic Information Figure 8 2 DNA is a Double Stranded Chain of Nucleotides DNA Figure 8 4 Microbial Genetics DNA and RNA What chemical carries the genetic instructions in cells and how is this chemical reproduced How is this chemical used inside the cell to direct the production of new molecules The Need for Protein Making Instructions Phenotype genotype environment 1 chromosome gene 1 protein DNA RNA copy protein production Structure of DNA The Genetic Material Two polynucleotide strands with H bonds DNA protein make up a chromosome RNA is single stranded difft sugar uracil How DNA copies itself when a cell divides DNA replication by unzipping DNA polymerase enzyme synthesizes new complementary strands 2 new helices Transcription Making a short DNA copy RNA polymerase makes RNA from DNA Only one set of instructions gene is



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