BACTERIA MORPHOLOGY MICRO BIOLOGY QUESTIONS

1.

Which of the following bacteria can grow in acidic pH?
A.     Vibrio cholerae
B.     Lactobacilli
C.     Shigella
D.     Salmonella
Answer & Explanation

Answer: Option B

Explanation:

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2.

Cell size and cell number can be measured using
A.     hemocytometer
B.     coulter counter
C.     petroff-hausser counting chamber
D.     none of these
Answer & Explanation

Answer: Option B

Explanation:

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3.

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 & Explanation

Answer: Option D

Explanation:

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4.

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 & Explanation

Answer: Option A

Explanation:

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5.

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 & Explanation

Answer: Option C

Explanation:

No answer description available for this question.