Microbiology midterm part 2

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. The procedures for culturing a microorganism require the use of a microscope.

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• false

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. Some microbes are not capable of growing on artificial media as pure cultures.

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• false

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. Mixed cultures are also referred to as contaminated cultures.

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• false

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. Bacterial cultures are easily identified from their microscopic appearance.

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• false

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. A medium that is gel-like has less agar in it compared to a solid medium.

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TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. A selective medium contains one or more substances that inhibit growth of some microbes to facilitate the growth of other desired microbes.

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TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. The bending of light rays as they pass from one medium to another is called refraction.

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Tags

NGSS.HS-PS4-5

TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. Fixed smears of specimens are required to perform the Gram stain or the endospore stain.

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TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false. Following a properly performed Gram stain, gram-positive bacteria will appear as pink or red cells.

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MULTIPLE CHOICE - Choose the one alternative that best completes the statement or answers the question. A microbiologist inoculates Staphylococcus aureus into a culture medium. Following incubation, both Staphylococcus aureus and Staphylococcus epidermidis are determined to be growing in this culture. What is the most likely explanation?

• The microbiologist used too much inoculum.

• The culture was contaminated.

• The incubation temperature was incorrect.

• The culture medium was selective.

• The culture medium was differential.