BACTERIOPHAGES QUIZ

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

Antigenic variation in Salmonella anatum

Toxin production in Corynebacterium diphtheriae

All of these

Toxin production in Clostridium botulinum types C and D

TRUE ANSWER : ?
YOUR ANSWER : ?

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

DNA phage

Adsorbed virus

RNA phage

Temperate virus

TRUE ANSWER : ?
YOUR ANSWER : ?

In viruses with envelopes

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 the embedded proteins are encoded by the viral nucleic acid

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

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ protein keeps the prophage dormant and prevents virus reproduction.

Operator

Promotor

Enhancer

Repressor

TRUE ANSWER : ?
YOUR ANSWER : ?

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

lipopolysaccharide

the cell membrane

the tip of the pilus

the cell wall

TRUE ANSWER : ?
YOUR ANSWER : ?

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

infection

induction

integration

repression

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Salmonella typhi

Staphylococcus aureus

Vibrio cholerae

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Proteins involved in cell lysis and phage release

All of these

Phage structural proteins

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

TRUE ANSWER : ?
YOUR ANSWER : ?

A bacterial defense mechanism against bacteriophage is called

restriction

polymerization

concatamerization

lysogeny

TRUE ANSWER : ?
YOUR ANSWER : ?

The procapsid is assembled with the aid of __________ proteins.

ladder

form

scaffolding

framing

TRUE ANSWER : ?
YOUR ANSWER : ?