BACTERIOPHAGES QUIZ

In viruses with envelopes

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

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

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

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T-even phage binding to E. coli probably involves

electrostatic interaction

covalent bonds

hydrophobic interaction

all of these

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

induction

repression

infection

integration

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

pock

plaque

all of these

pox

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

RNA transcriptase

RNA polymerase

RNA ligase

RNA replicase

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

Salmonella typhi

Vibrio cholerae

Staphylococcus aureus

All of these

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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

Phage structural proteins

Proteins involved in cell lysis and phage release

All of these

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

Antigenic variation in Salmonella anatum

Toxin production in Clostridium botulinum types C and D

Toxin production in Corynebacterium diphtheriae

All of these

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A bacterial defense mechanism against bacteriophage is called

restriction

lysogeny

concatamerization

polymerization

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