Microbiology - Bacteriophages

Exercise :: Bacteriophages - Section 1

  • Bacteriophages - Section 1
6. 

Contractile sheath of the tail is present in which of the following phages?

A. T3
B. T2
C. P22
D. All of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

7. 

One of the first enzymes synthesized by many bacteriophage is __________ , an RNA-dependent RNA polymerase.

A. RNA transcriptase
B. RNA polymerase
C. RNA ligase
D. RNA replicase

Answer: Option D

Explanation:

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8. 

In viruses with envelopes

A. the envelope and the embedded proteins are encoded by the viral nucleic acid
B. the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid
C. the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins
D. the envelope and its imbedded proteins are derived from the host's membranes

Answer: Option B

Explanation:

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9. 

Which of the following bacteria can be typed by phage typing method?

A. Staphylococcus aureus
B. Salmonella typhi
C. Vibrio cholerae
D. All of these

Answer: Option D

Explanation:

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10. 

__________ protein keeps the prophage dormant and prevents virus reproduction.

A. Operator
B. Promotor
C. Repressor
D. Enhancer

Answer: Option C

Explanation:

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