BACTERIOPHAGES QUIZ

The procapsid is assembled with the aid of __________ proteins.

ladder

framing

form

scaffolding

TRUE ANSWER : ?
YOUR ANSWER : ?

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

DNA phage

Temperate virus

RNA phage

Adsorbed virus

TRUE ANSWER : ?
YOUR ANSWER : ?

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

P22

All of these

T2

T3

TRUE ANSWER : ?
YOUR ANSWER : ?

T-even phage binding to E. coli probably involves

all of these

hydrophobic interaction

covalent bonds

electrostatic interaction

TRUE ANSWER : ?
YOUR ANSWER : ?

In viruses with envelopes

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

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

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 : ?

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

the cell membrane

lipopolysaccharide

the tip of the pilus

the cell wall

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ protein keeps the prophage dormant and prevents virus reproduction.

Promotor

Operator

Repressor

Enhancer

TRUE ANSWER : ?
YOUR ANSWER : ?

Which capsid symmetry is exhibited by most of the phages?

Helical

Icosahedral

Complex

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Toxin production in Corynebacterium diphtheriae

Toxin production in Clostridium botulinum types C and D

Antigenic variation in Salmonella anatum

All of these

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YOUR ANSWER : ?

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

RNA ligase

RNA replicase

RNA transcriptase

RNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?