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Cell Cultures and Characteristics

Cell Cultures and Characteristics
Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate

acid fast organisms
yeasts
coliform bacteria
gram positive bacteria

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Cell Cultures and Characteristics
When a substance is added to a liquid medium which inhibits the growth of unwanted bacteria and favors the growth of wanted bacteria, it is known as

differential medium
enriched medium
enrichment medium
selective medium

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Cell Cultures and Characteristics
To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of

6.79
8.5
3.5
8.90

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Cell Cultures and Characteristics
Plate counts are often reported as

cfu/ml
thousands/ml
Both (a) and (b)
cfu

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Cell Cultures and Characteristics
The concentration of agar to obtain semi solid media is

>10%
>10%but<20%
0.5% or less
1.5-20%

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Cell Cultures and Characteristics
Treponema species from human oral cavity can be selected by using

pH of the medium
cell size and motility
incubation temperature
all of these

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