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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

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

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Cell Cultures and Characteristics
Cell counting can be carried out by

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

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Cell Cultures and Characteristics
Plate counts are often reported as

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

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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
selective 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

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

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Cell Cultures and Characteristics
Cell size and cell number can be measured using

petroff-hausser counting chamber
none of these
coulter counter
hemocytometer

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