Fundamentals of virology Flashcards
2015-2018
A host cell component utilized by all viruses
A. Mitochondria
B. Ribosomes
C. RNA polymerase
D. Endoplasmic reticulum
B
The structure that dictates the type of the cell, organ, or host to be infected by a virus
A. Viral attachment proteins
B. Peplomers
C. Host cell receptor
D. Capsomeres
C
Which of the following is a small and obligately intracellular parasite like viruses?
A. Chlamydia
B. Mycoplasma
C. viroid
D. prion
*
The enzyme used by HIV viruses during its transcription step is
A. reverse transcriptase
B. host cell RNA polymerase
C. integrase
D. RNA-dependent RNA polymerase
*
The period during viral replication when infectious virus cannot be detected is known specifically as the _________ period
A. latent
B. eclipse
C. adsorption
D. log
A
Viruses that have this characteristic are generally associated with acute infections
A. Helical capsid symmetry
B. Icosahedral symmetry
C. Enveloped
D. Non-enveloped
D
Characteristic that differentiates reoviruses, orthomyxoviruses, bunyavirsuses, and arenaviruses from other viruses
A. Segmented genome
B. Enveloped
C. Carrier of their own enzyme
D. Presence of RNA genome
*
Viruses are prone to mutation if they have this structure
A. Envelope
B. Peplomer
C. Reverse transcriptase
D. RNA genome
D
Infectious even if uncoated
A. dsDNA
B. ds RNA
C. ss (+) RNA
D. ss (-) RNA
C
The progeny of virus produced during viral replication are complete in structure if
A. it has a helical capsid
B. it has an icosahedral capsid
C. it is enveloped
D. it is non-enveloped
*
Which of the following is derived from host cell?
A. Envelope
B. Capsid
C. RNA polymerase
D. DNA
*
All DNA viruses replicate in the nucleus except
A. Papovaviridae
B. Parvoviridae
C. Poxviridae
D. Picornaviridae
C
All viral genomes are haploid except genomes of members of this viral family which are diploid
A. Poxviridae
B. Retroviridae
C. Hepadnaviridae
D. Reoviridae
*
Results in a persistent infection
A. dsDNA virus
B. ss (+) RNA virus
C. ss (-) RNA virus
D. Enveloped virus
*
Structural unit of viral capsid
a. Capsomere
b. Protomer
c. Hematogluttin
d. pocholol
A
What is the term used for the entire infectious unit or complete virus particle?
a. Nucleocapsid
b. Virion
c. Viral envelope
d. Viroid
B
The statement “viruses contain only one type of nucleic acid, either DNA or RNA is T/F
T
Viruses only infect eukaryotic cells
a. TRUE
b. FALSE
B
Viruses that are not enveloped have external capsid.
a. TRUE
b. FALSE
A
The statement, “viruses are cultivated in cell cultures from animal specimen” is
a. TRUE
b. FALSE
A
Common cause of bronchiolitis and pneumonia in 4 years-old child.
A. Inluenza virus
B. Parainfluenza virus
C. RSV
D. Rotavirus
C
The following are from Picornaviridae family that affects the GI system except
A. Echovirus
B. Polio virus
C. Coxsackievirus
D. Rhinovirus
D
Viruses are destroyed by heat but they can thrive in adverse environments if they are naked. T/F
T
Which of the following viruses exhibits latent infections?
A. Dengue virus
B. Varicella zoster virus
C. Hepatitis A virus
D. Rotavirus
B
Prion will cause the following diseases except:
A. Creutzfeld-Jakob disease
B. Scrapie in sheep
C. Mad cow’s disease
D. Subacute sclerosing panencephalitis
D
This virus has a prediliction for epidermal cells, has an envelope and is brick-shaped
A. Cytomegalovirus
B. Human Papilloma virus
C. Molluscum contangiosum virus
D. Herpes virus-1
C
