BIOD 171 Module 4 Quiz with Verified Answers |Latest 2024/2025
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Course
BIOD 171
Institution
BIOD 171
What are the requirements of a fastidious microbe? A fastidious microbe is an organism with complex growth requirements and will not grow without then. Enriched medias thus contain these specific and essential nutrients required for the growth of a particular subset of microorganisms.
What is ...
Alpha hemolysis _;- Presents with greenish-brown color on blood agar _;-_;- _;- _;- _;- _;- _;- _;- _;- _;-
due to the partial lysis of red blood cells
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, Beta hemolysis
_;- Clear zones on blood agar indicate beta hemolysis, _;-_;- _;- _;- _;- _;- _;- _;- _;- _;- _;-
which is the complete lysis of red blood cells
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Gamma hemolysis Presents a white/tan on blood agar due to the
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lack of hemolytic activity.
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What is the primary purpose of Columbia CNA agar?
_;- _;- _;- As it _;- _;- _;- _;- _;- _;-_;- _;- _;- _;-
suppresses the growth of Gram-negative bacteria CNA agar is, therefore,
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used for isolation of Gram-positive microbes.
_;- _;- _;- _;- _;-
Name the type of plate derived from BAP that contains lysed red blood
_;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;-
cells Lysed red blood cells (RBCs) are a primary component in the
_;-_;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;-
formulation of Chocolate agar. _;- _;- _;-
Define the selective and differential abilities of a MacConkey agar plate
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MacConkey agar is selective in that only Gram-negative microbes
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will grow on the agar -Gram-positive microbes simply do not grow.
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MacConkey agar is also considered a differential media as it
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distinguishes between microbes capable of fermenting lactose (red
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colonies) and those that are non-fermenters (white/tan colonies).
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What colors would you expect to see on an EMB plate containing E.
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coli? The EMB plate itself is red in color while in the presence of E.
_;-_;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;-
coli, the growing colonies will take on a distinctive metallic green sheen.
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