VIRUSES QUIZ

The first step in infection of a host bacterial cells by a phage is

adsorption

penetration

absorption

replication

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not true of virions?

Contain DNA

Contain RNA

Reproduce independently

Are extracellular

TRUE ANSWER : ?
YOUR ANSWER : ?

The envelope of an enveloped virus is derived from

none of these

the endoplasmic reticulum of the cell

the mitochondrion of the cell

the cell membrane

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following disinfectant is effective against viruses?

Formaldehyde

Hydrogen peroxide

Hypochlorite

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The repressor protein, since the cell is resistant to lysis from externally infecting phage, is also called

immunity repressor

none of these

immunity operon

operon repressor

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following viruses belong to family Hepadnaviridae?

Hepatitis D virus

Hepatitis B virus

Hepatitis A virus

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The viruses in an attenuated vaccine

continue to replicate

is altered with chemicals

are usually larger than bacteria

have no genome

TRUE ANSWER : ?
YOUR ANSWER : ?

Usually viruses are separated into several large groups based primarily on

nucleic acid characteristics

capsid symmetry

diameter of the viroin or nucleocapsid

nature of the host

TRUE ANSWER : ?
YOUR ANSWER : ?

In the simplest capsid, there is a capsomere at each of the 12 vertices; this capsomere, which is surrounded by five other capsomeres, is termed a

penton

helical

icosahedral

polyhedra

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following viruses can rescue adenovirus in simian cells?

Rabies

Simian virus 40

Cytomegalovirus

Vaccinia

TRUE ANSWER : ?
YOUR ANSWER : ?

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