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BIOS 280 Lab Quiz 3 ; Questions and Answers $13.99   Add to cart

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BIOS 280 Lab Quiz 3 ; Questions and Answers

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  • Course
  • BIOS 280
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  • BIOS 280

BIOS 280 Lab Quiz 3 ; Questions and Answers

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  • September 18, 2024
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  • 2024/2025
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  • Questions & answers
  • BIOS 280
  • BIOS 280
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BIOS 280 Lab Quiz 3 ; Questions and Answers


trypticase soy agar is an example of a ____ medium Correct Ans-rich (undefined)




most bacteria grow well on ____ media Correct Ans-rich




a ____ medium is one that only allows the growth of certain kinds of bacteria Correct Ans-

selective




an example of selective media is that eosin methylene blue (EMB) agar contains chemicals

that are usually toxic to Gram-positive bacteria; this means that usually only Gram-____

bacteria can grow on EMB agar Correct Ans-negative




an example of selective media is that mannitol salt agar (MSA) contains a high concentration

of salt that selects for the growth of halophiles; the media usually discourages the growth of

Gram-____ bacterial cells and encourages the growth of Gram-____ bacteria, especially

bacteria of the genus Staphylococcus Correct Ans-negative


positive

, BIOS 280 Lab Quiz 3 ; Questions and Answers
there are even selective agars that discourage ____ growth; Sabouraud's agar is toxic to

bacteria but supports the growth of fungi Correct Ans-bacterial




a ____ medium is one that, in some way, shows a difference between the colonies of

organisms that grow on the medium Correct Ans-differential




an example of differential media is that on EMB agar, the colonies of organisms that ferment

lactose appear ____, while the colonies of non-fermenters will be white or pale ____

Correct Ans-purple


pink




on some differential agars, there is a change in the color of the colonies; on other differential

agars the color of the ____ itself may change; differential media can be very helpful in

identifying bacteria Correct Ans-agar




glucose mineral salt agar (GMS) is a ____, chemically defined medium; to survive, organisms

need to make all their cellular components from ____ and the inorganic salts that are in the

medium; no growth factors are present Correct Ans-simple


glucose

, BIOS 280 Lab Quiz 3 ; Questions and Answers


trypticase soy agar (TSA) is a rich, complex ____ medium with soy products and proteins; it

supports the growth of most bacteria, including those that require vitamins, pre-formed

amino acids, or other ____ factors Correct Ans-undefined


growth




Eosin Methylene Blue (EMB) is an agar that is both selective and differential; it is usually

selective for Gram-____ rods and usually inhibits the growth of Gram-____ bacteria

Correct Ans-negative


positive




Eosin Methylene Blue (EMB) is also differential for bacteria that can ferment ____; a lactose

fermenter will produce dark purple colonies; if the fermenter also produces a lot of ____ as a

waste product, the colonies will take on a green sheen Correct Ans-lactose


acid




non-fermenters will also grow well on EMB, but those colonies will be white or light ____

Correct Ans-pink

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