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Bacteriophages

Bacteriophages
The procapsid is assembled with the aid of __________ proteins.

ladder
framing
form
scaffolding

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

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

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Bacteriophages
__________ protein keeps the prophage dormant and prevents virus reproduction.

Operator
Promotor
Enhancer
Repressor

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

Salmonella typhi
Staphylococcus aureus
All of these
Vibrio cholerae

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

RNA polymerase
RNA ligase
RNA replicase
RNA transcriptase

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

Helical
Complex
Icosahedral
None of these

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