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Bacteriophages

Bacteriophages
The process by which phage reproduction is initiated in lysogenized culture is called

infection
integration
repression
induction

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

All of these
Salmonella typhi
Staphylococcus aureus
Vibrio cholerae

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Bacteriophages
Which capsid symmetry is exhibited by most of the phages?

Complex
None of these
Icosahedral
Helical

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Bacteriophages
Which of the following properties is due to lysogenic conversion by phages?

All of these
Toxin production in Clostridium botulinum types C and D
Toxin production in Corynebacterium diphtheriae
Antigenic variation in Salmonella anatum

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

RNA replicase
RNA ligase
RNA polymerase
RNA transcriptase

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Bacteriophages
A bacterial defense mechanism against bacteriophage is called

restriction
concatamerization
lysogeny
polymerization

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