Bacteria Reproduction

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Bacteria Reproduction
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Asexual Reproduction

• Binary Fission DNA replicates and the cell
  divides in two.

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Genetic Recombination
Good Essay Question!
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Genetic Recombination
Transformation

• _______________
• receives fragments of DNA from the environment

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Genetic Recombination

• Transduction
• DNA carried into a cell through viruses

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Genetic Recombination

• Conjugation exchange of DNA fragments

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Microbes in

• Sewage Treatment
• Oil Spills
• Digestive System
• Biotechnology
• Diagnostics
• Good Essay Question, with examples.

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Domain Archaea

• Group Methanogens
• methane releasing
• Group Halophiles
• lives in high salt areas
• Group Thermophiles
• lives in extreme temperatures

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Viruses
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b
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Virus Structure

• Nucleic acid encased in a protein coat

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Virus Structure

• Capsid Protein coat covering virus present in
  all viruses. Capsids are made from protein
  subunits called capsomeres.
• __________ Layer of fat surrounding capsid
  present in some viruses but not all.

Envelope
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Viral Replication

• Only reproduce when they enter a host cell
• They lack ribosomes and enzymes necessary for
  protein synthesis and simple metabolism

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Viral Genome Structure

• dsDNA
• ssDNA
• dsRNA
• ssRNA
• Serve as mRNA
• Serve as template for mRNA
• Serve as template for DNA (retro)

Bullet shaped envelope
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HIV (a retrovirus)

• Viruses that causes AIDS
• Peters Duesberg

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______
Polio

• ss RNA that can serve as mRNA
• Can cause paralysis in motor neurons
• Transmitted through fecal contaminated food/water
• Worse in intermediately clean cities
• Salk vaccine, 1954

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Hepatitis

• Inflammation of the liver
• At least 5 different types of the virus
• Hep A ss RNA, no envelope fecal-oral
• Hep C ss RNA with envelope sexually
  transmitted/ blood

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__________
Rabies

• Bullet Shaped Envelope (ss RNA)
• Long incubation period
• Almost always fatal if unvaccinated.
• Zoonosis
• Host Range

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Flu

• Influenza, commonly known as the flu
• Symptoms include fever, sore throat, myalgia,
  coughing, weakness
• Many Epidemic/
• Episodes (1918-1919) 20-100 million died Spanish
  Flu

Pandemic
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Prions

• Infectious Protein Particles
• Examples
• Mad Cow Disease
• Creutzfeldt-Jakob Disease
• Kuru (Fore tribe of Papua New Guinea)