BACTERIOPHAGES QUIZ

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

All of these

Vibrio cholerae

Salmonella typhi

Staphylococcus aureus

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A bacterial defense mechanism against bacteriophage is called

lysogeny

concatamerization

polymerization

restriction

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

integration

infection

repression

induction

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The procapsid is assembled with the aid of __________ proteins.

framing

form

scaffolding

ladder

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Which capsid symmetry is exhibited by most of the phages?

Icosahedral

Helical

None of these

Complex

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Which of the following is/are synthesized from late mRNA?

Proteins that help with phage assembly without becoming part of the virion structure

All of these

Proteins involved in cell lysis and phage release

Phage structural proteins

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Area of lysis on a bacterial lawn culture produced by a phage is known as

pox

pock

plaque

all of these

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__________ protein keeps the prophage dormant and prevents virus reproduction.

Promotor

Repressor

Enhancer

Operator

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The filamentous bacteriopohage infect male E. coli cells by attaching to

lipopolysaccharide

the tip of the pilus

the cell membrane

the cell wall

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

T2

T3

All of these

P22

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