WorksheetsViruses
Total questions: 27
Worksheet time: 14mins
The core of every virus particle always contains
DNA and RNA
DNA
either DNA or RNA
Capsomers
Which is incorrect about prophages?
replicated with host DNA and passed on to progeny
occur when temperate phages enter host cells
formed when viral DNA enters the bacterial chromosome
always lyse the host cells
Satellite viruses are
also called viroids
dependent on other viruses for replication
significant pathogens of plants
the cause of spongiform encephalopathies
Viruses acquire envelopes around their nucleocapsids during
penetration
adsorption
release
assembly
The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is
injection of the viral nucleic acid into the host cell
adsorption to the host cells
host cell synthesis of viral enzymes and capsid proteins
assembly of nucleocapsids
Host range is limited by the
age of the host cell
size of the host cell
type of host cell receptors on cell membrane
type of nucleic acid in the virus
Viral infections are easier to treat with drugs than bacterial infections.
True
False
A bacteriophage is a
bacterial cell that mixes its DNA with host cell
virus that mixes its DNA with a host cell
virus that infects bacteria
none of these
Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?
enveloped virus
DNA virus
nonenveloped virus
RNA virus
Host cells of viruses include
protozoa and algae
plants and fungi
bacteria
humans and other animals
all of these are correct
The correct sequence of events in viral multiplication is
adsorption, penetration, replication, maturation, assembly, release
replication, penetration, maturation, assembly, adsorption, release
adsorption, release, maturation, replication, assembly, penetration
assembly, maturation, replication, release, penetration, adsorption
Viral capsids are made from subunits called
spikes
prophages
envelopes
capsomers
The capsomers are made of
carbohydrate
lipids
proteins
DNA
A naked virus does not have a(n)
capsomer
envelope
Spike protein
capsid
Which of these structures are used by bacteriophages to attach to host cell receptors?
tail fibers
sheath
capsid head
nucleic acid
How do enveloped animal viruses exit their host?
busting the cell open
budding or exocytosis
rupturing the virus
endocytosis
The three basic groups of viruses based on morphology include
enveloped viruses, DNA viruses, and nonenveloped viruses
helical viruses, round viruses, and enveloped viruses
enveloped viruses, nonenveloped viruses, and complex viruses
nonenveloped viruses, RNA viruses, and bacteriophages
Prophages can be activated into viral replication and enter the lytic cycle.
True
False
T-even phages
enter host cells by engulfment
include the poxviruses
infect Escherichia coli cells
have helical capsids
Creutzfeldt-Jakob disease is
caused by a viroid
caused by a chronic latent virus
also called "Mad Cow" disease
a spongiform encephalopathy of humans
Oncogenic viruses include all the following except
Epstein-Barr virus
Measles virus
Hepatitis B virus
Papillomavirus
The protein shell around the nucleic acid core of a virus is called a
S protein
sheath
capsid
cell membrane
Infectious naked strands of RNA are called
oncogenic viruses
viroids
phages
prions
Infectious protein particles are called
prions
spikes
phages
oncogenic viruses
Which of the following will not support viral cultivation?
live lab animals
blood agar
primary cell cultures
embryonated bird eggs
Which of the following represents a virus family name?
Herpesviridae
Picornavirus
Enterovirus
Hepatitis B virus
Herpes simplex virus
When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.
True
False
