Exam 2

Psychrophiles 0-20C Mesophile 15-45C Thermophile 40-80C Hyperthermophile 80-121C Heat-shock response stabilizes proteins and membranes in response to high heat. What are the physical agents that impede bacterial growth? Pasteurization, freezing, irradiation, and autoclave. What is

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Exam 2

obligate aerobes use oxygen as substrate in obligatory metabolism obligate anaerobes poisoned by any exposure to oxygen in form of O2 aerotolerant anaerobes don’t use oxygen as substrate but tolerate its presence; must get element

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exam 2

Blood agar is a chemically defined media.T or F F Question: Biofilms are important because I. they faciltate quorum sensing II. they allow bacteria to form two-dimensional structures III. they might facilitate gene transfer IV.

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Exam 2

What are the symptoms of Botulism? Blurred vision slurred speech difficulty swallowing labored breathing flaccid paralysis What are the sypmptoms of Staphylococcal food poisoning? vomiting abdominal cramps nausea diarrhea *Symptoms only last an hour* Complete

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Exam 2

Bioinformatics the use of computational tools to acquire, analyze, store, and access DNA and protein sequences Chromosomal Island Region of bacterial chromosome of foriegn origin that contains clustered genes for extra property such as virulence

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Exam 2

Anthrax(Bacillus anthracis) Inhaled spores, engulfed but not killead by phagocytes. Respiratory distress, necrosis of small vessels and bleeding from orifices. Sudden death. Botulism(Clostridium botulinum) Ingest toxin, absorbed through GI, binds NM junction, flaccid paralysis. Tetanus(Clostridium

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Exam 2

Viruses Pirates of host cell functions Obligate intracellular parasites no ribosomes, membranes or organelles requires electron mircroscope Viral Structure have either DNA or RNA some have lipid envelope protein coat, capsid, is composed of capsomere

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EXAM 2 MICRO

Genetic variability in Eukaryotes Sex accomplishes reproduction and recombination Genetic Variability in Bacteria Seperate the process   -reproduction (binary fission)= verticle gene transfer -recombination (or new combinations of genes in existing cells)= horizontal gene transfer

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