BACTERIOPHAGES QUIZ

The procapsid is assembled with the aid of __________ proteins.

ladder

scaffolding

form

framing

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YOUR ANSWER : ?

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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__________ protein keeps the prophage dormant and prevents virus reproduction.

Operator

Enhancer

Promotor

Repressor

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Which capsid symmetry is exhibited by most of the phages?

Icosahedral

Complex

Helical

None of these

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A bacterial defense mechanism against bacteriophage is called

restriction

concatamerization

lysogeny

polymerization

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

DNA phage

RNA phage

Temperate virus

Adsorbed virus

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

P22

T3

All of these

T2

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In viruses with envelopes

the envelope and the embedded proteins are encoded by the viral nucleic acid

the envelope and its imbedded proteins are derived from the host's membranes

the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid

the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins

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YOUR ANSWER : ?

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

Phage structural proteins

All of these

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

Proteins involved in cell lysis and phage release

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

Toxin production in Clostridium botulinum types C and D

All of these

Toxin production in Corynebacterium diphtheriae

Antigenic variation in Salmonella anatum

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YOUR ANSWER : ?