Fundamentals of virology

Question 1

A host cell component utilized by all viruses

A. Mitochondria
B. Ribosomes
C. RNA polymerase
D. Endoplasmic reticulum

Answer 1

B

Question 2

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

Answer 2

C

Question 3

Which of the following is a small and obligately intracellular parasite like viruses?

A. Chlamydia
B. Mycoplasma
C. viroid
D. prion

Answer 3

*

Question 4

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

Answer 4

*

Question 5

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

Answer 5

A

Question 6

Viruses that have this characteristic are generally associated with acute infections

A. Helical capsid symmetry
B. Icosahedral symmetry
C. Enveloped
D. Non-enveloped

Answer 6

D

Question 7

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

Answer 7

*

Question 8

Viruses are prone to mutation if they have this structure

A. Envelope
B. Peplomer
C. Reverse transcriptase
D. RNA genome

Answer 8

D

Question 9

Infectious even if uncoated

A. dsDNA
B. ds RNA
C. ss (+) RNA
D. ss (-) RNA

Answer 9

C

Question 10

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

Answer 10

*

Question 11

Which of the following is derived from host cell?

A. Envelope
B. Capsid
C. RNA polymerase
D. DNA

Answer 11

*

Question 12

All DNA viruses replicate in the nucleus except

A. Papovaviridae
B. Parvoviridae
C. Poxviridae
D. Picornaviridae

Answer 12

C

Question 13

All viral genomes are haploid except genomes of members of this viral family which are diploid

A. Poxviridae
B. Retroviridae
C. Hepadnaviridae
D. Reoviridae

Answer 13

*

Question 14

Results in a persistent infection

A. dsDNA virus
B. ss (+) RNA virus
C. ss (-) RNA virus
D. Enveloped virus

Answer 14

*

Question 15

Structural unit of viral capsid

a. Capsomere
b. Protomer
c. Hematogluttin
d. pocholol

Answer 15

A

Question 16

What is the term used for the entire infectious unit or complete virus particle?

a. Nucleocapsid
b. Virion
c. Viral envelope
d. Viroid

Answer 16

B

Question 17

The statement “viruses contain only one type of nucleic acid, either DNA or RNA is T/F

Answer 17

T

Question 18

Viruses only infect eukaryotic cells

a. TRUE
b. FALSE

Answer 18

B

Question 19

Viruses that are not enveloped have external capsid.

a. TRUE
b. FALSE

Answer 19

A

Question 20

The statement, “viruses are cultivated in cell cultures from animal specimen” is

a. TRUE
b. FALSE

Answer 20

A

Question 21

Common cause of bronchiolitis and pneumonia in 4 years-old child.

A. Inluenza virus
B. Parainfluenza virus
C. RSV
D. Rotavirus

Answer 21

C

Question 22

The following are from Picornaviridae family that affects the GI system except

A. Echovirus
B. Polio virus
C. Coxsackievirus
D. Rhinovirus

Answer 22

D

Question 23

Viruses are destroyed by heat but they can thrive in adverse environments if they are naked. T/F

Answer 23

T

Question 24

Which of the following viruses exhibits latent infections?

A. Dengue virus
B. Varicella zoster virus
C. Hepatitis A virus
D. Rotavirus

Answer 24

B

Question 25

Prion will cause the following diseases except:

A. Creutzfeld-Jakob disease
B. Scrapie in sheep
C. Mad cow’s disease
D. Subacute sclerosing panencephalitis

Answer 25

D

Question 26

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

Answer 26

C