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Cell Cultures and Characteristics

Cell Cultures and Characteristics
In the pour plate method, the mixed culture is diluted directly in tubes of

both (a) and (b)
sterile liquid usually water
liquid agar medium
none of these

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

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

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Cell Cultures and Characteristics
Cell counting can be carried out by

membrane filter count
All of these
plate counting
direct microscopic count using petroffhansser counting chamber

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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

selective medium
differential medium
enrichment medium
enriched medium

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Cell Cultures and Characteristics
In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

-20 to -30°C
-60 to -78°C
-48 to -58°C
-30 to -48°C

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Cell Cultures and Characteristics
Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni?

None of these
Trimethoprim
Polymyxin
Vacomycin

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