lecture 35 W11 - Figure 28-00 Lecture 35 (4/11/11) -...

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Figure 28-00
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1) Review the three domains of life and how to identify new species of bacteria or archea 2) Describe some aspects of microbial metabolism 3) Go over some general features of viruses 4) Describe the life cycle of HIV Lecture 35 (4/11/11) - Microbes and Viruses
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Molecules; Chemical bonds; Free energy Lipids Amino acids nucleotides carbohydrates membranes proteins Membrane transport Membrane proteins cytoskeleton enzymes DNA RNA Metabolism Sugar transport Electrolyte transport Kidney Nerve cells Transporters and pumps Receptors Cell-cell communication Chemical signaling development Replication transcription translation Glycolysis Fermentation Krebs cycle Photo- Synthesis & Calvin cycle Cell cycle Regulation of transcription biotechnology genomics Microbes Biology 172 flowchart (lecture 35) cancer epigenetics
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Amazing Facts about Microbes More than 5,000 species described but likely that tens of millions exist Number of bacteria that live in and on you vastly outnumbers the total cells in your body Dominant life form on earth may be a species of bacterial plankton (at surface of sea water) Found everywhere, in extreme habitats
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Sequence analysis of rRNA and other genes indicates that Archaea are more closely related to eukarya than bacteria
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Other characteristics also favor the model suggested by DNA sequence
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Many archaea and bacteria are difficult to culture in the laboratory and they were initially discovered by analysing their DNA (e.g. ocean water was previously thought to be sterile, but it is full of archaea and bacteria. Understanding how these relatively newly discovered organisms contribute to ecosystems is an exciting field of microbiology.
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Figure 28-2 This spike is due to the 1918 flu epidemic What factors have reduced the mortality rate over the last century?
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Antibiotics (should) kill bacteria Many are naturally occurring compounds from fungi and bacteria (
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lecture 35 W11 - Figure 28-00 Lecture 35 (4/11/11) -...

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