MIcrobiology 2

microbiology-2-2

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1. Homo Sapiens and Escherichia coli are metabolically classified as

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Halophiles thrive in salty environments and Thermophiles thrive in cold environments

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Which one of the following genus of bacteria is a gram positive obligate anaerobe

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Part of the growth curve where bacteria are most frequent making ribosomes

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Part of the growth where the generation time is measured

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Characteristics of bacterial cells that can be seen with a microscope that indicate they are alive

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Characteristics of bacterial cells that can be seen with a microscope that indicate they are alive

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Blood agar is best described as an

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One ml is taken from a culture of bacteria and is spread on a petri dish containing agar medium. After incubation, 100 colonies are produced. Estimate the concentration of viable cells per ml in the original culture

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. Two ml is taken from a culture of bacteria and is spread on a Petri dish containing agar medium. After incubation, 100 colonies are produced. Estimate the concentration of viable cells per ml in the original culture.

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. One ml is taken from a culture and added to 9 ml of sterile medium to give a total volume of 10 ml. After mixing, 1 ml of this is spread on a petri dish containing agar medium. After incubation, 100 colonies are produced. Estimate the concentration of viable cells per ml in the original culture.

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Mutants of Salmonella that require amino acids and vitamins as known as auxotrophs

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Discovery that DNA is the transforming particle of Griffith's experiments with Streptococcus pneumoniae

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Base pair rule is not used in which one of the following cellular activities

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The Ames test uses mutants of this gram-negative bacterium to detect mutagens

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