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Bacteriophages

Bacteriophages
A bacterial defense mechanism against bacteriophage is called

restriction
concatamerization
polymerization
lysogeny

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

induction
infection
repression
integration

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

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

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

Helical
None of these
Icosahedral
Complex

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

P22
T2
T3
All of these

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Bacteriophages
__________ is specifically able to have a long-term relationship with the host known as lysogeny.

Adsorbed virus
DNA phage
Temperate virus
RNA phage

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