Exercise: Cell Cultures And Characteristics

Questions for: Cell Cultures And Characteristics

The solidifying agent commonly used in preparation of media is/are
A:
agar
B:
silica gel
C:
both (a) and (b)
D:
none of these
Answer: C
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In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at
A:
-60 to -78°C
B:
-20 to -30°C
C:
-30 to -48°C
D:
-48 to -58°C
Answer: A
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Which of the following is used for the proper maintenance and preservation of pure cultures?
A:
Periodic transfer to fresh media
B:
Preservation by overlaying cultures with mineral oil
C:
Preservation by lyophilization
D:
All of the above
Answer: D
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Cell size and cell number can be measured using
A:
hemocytometer
B:
coulter counter
C:
petroff-hausser counting chamber
D:
none of these
Answer: B
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Which of the following bacteria can grow in acidic pH?
A:
Vibrio cholerae
B:
Lactobacilli
C:
Shigella
D:
Salmonella
Answer: B
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