Module 1

Question 1

This are used to classify viruses based on its type and structural characteristics

Answer 1

Viral Nucleic Acids in the Virion

Question 2

TRUE or FALSE:
If uninterrupted, single infectious particle can replicate to produce one of progeny virus
particle.

Answer 2

FALSE

Question 3

TRUE or FALSE:
Retroviridae uses reverse transcriptase to create a DNA copy of their RNA genome

Answer 3

TRUE

Question 4

TRUE or FALSE:
Are unfilterable agents that could not be cultivated on artificial media

Answer 4

FALSE:
They are filterable agents

Question 5

General term to describe situations where mixed infections result in enhanced yields of one or both viruses in the mixture

Answer 5

Complementation

Question 6

The mechanism by which a particular base sequence in messenger RNA produces a specific amino acid sequence in a protein

Answer 6

Translation

Question 7

The means by which specific information encoded in a nucleic acid chain is transferred to messenger RNA

Answer 7

Transcription

Question 8

These always contain altered host-cell membrane components

Answer 8

Envelope

Question 9

TRUE or FALSE:
Non-enveloped viruses are resistant organic solvents

Answer 9

TRUE

Question 10

Viruses contain how many types of nucleic acid?

Answer 10

1

Question 11

Morphologic units composed of structural units embedded in the envelope

Answer 11

Peplomers

Question 12

This virus family are considered to have diploid; containing two whole-genomic positive sense RNAs

Answer 12

Retroviridae

Question 13

Complete infective virus particle; may be identical to the nucleocapsid; more complex virions
include the nucleocapsid + envelope

Answer 13

Virion

Question 14

Outer coat of some viruses acquire as they penetrate or are budded from the nuclear or cytoplasmic membrane

Answer 14

Envelope

Question 15

Viruses that cannot produce from their own nucleic acid and virions are non-infectious

Answer 15

Satellite Viruses

Question 16

What virus family is made up of complex viruses with envelope

Answer 16

Herpesviridae and Paramyxoviridae

Question 17

Functionally deficient particles in some aspect of replication and may interfere with the replication of normal viruses

Answer 17

Defective Virus

Question 18

TRUE or FALSE:
ALL viruses are obligate intracellular parasites

Answer 18

TRUE

Question 19

Period of time between the penetration of the virus particle into the host cell and the production of the
first new virus particle.

Answer 19

Eclipse period

Question 20

RNA viruses has this property of it is able to directly capable of translation to protein

Answer 20

Positive sense

Question 21

They require a helper virus for transmission and multiplication

Answer 21

Satellite Virus

Question 22

RNA viruses has this property of it is of the same sense of mRNA

Answer 22

Positive sense

Question 23

TRUE or FALSE:
RNA viruses have overall structure of genome is less complex

Answer 23

FALSE

Question 24

What virus family is made up of simple viruses; their virion is composed of viral structural proteins and DNA

Answer 24

Parvoviridae

Question 25

Smallest infectious agents causing disease in plants

Answer 25

Viroid

Question 26

The capsid together with the enclosed nucleic acid

Answer 26

Nucleocapsid

Question 27

RNA viruses has this property if it requires transcription of the genome to generate mRNA equivalent

Answer 27

Negative sense

Question 28

TRUE or FALSE: Disrupting cells during this period will interrupt the release of significant numbers of infectious virus particles.

Answer 28

TRUE

Question 29

Protein Shell that encloses the nucleic acid core

Answer 29

Capsid

Question 30

This enzyme converts RNA into DNA

Answer 30

Reverse Transcriptase

Question 31

Early bacteriologists believed that all contagious and infectious diseases were caused by ?

Answer 31

Bacteria

Question 32

TRUE or FALSE: ALL obligate intracellular parasites are viruses

Answer 32

FALSE

Question 33

This is the major type of protein present on the exterior of the membrane of enveloped viruses

Answer 33

Glycoproteins

Question 34

What are the two main classification systems of Viruses

Answer 34

1. ICTV (International Committee on Taxonomy of Viruses) 2. Baltimore Classification System

Question 35

What's the correct arrangement of viral replication I. Intact virus particle ceases to exist (uncoating). II. The virus attaches to a host cell. III. Assembly and appearance of new progeny virus particles. IV. Enters the cell. V. Viral genome directs the production of new viral macromolecules.

Answer 35

II > IV > I > V > III

Question 36

TRUE or FALSE: Outside living cells, viruses can produce and replicate itself

Answer 36

FALSE

Question 37

TRUE or FALSE: Enveloped viruses are inactivated by inorganic solvents

Answer 37

FALSE

Question 38

Morphologic units seen on the surfaces of icosahedral virus particles; represent clusters of structure units

Answer 38

Capsomeres

Question 39

Many attribute the beginning of virology to the work of?

Answer 39

Ivanovsky and Beijerinck

Question 40

Viruses that infect bacterial cells

Answer 40

Bacteriophages

Question 41

Baltimore Classification System is developed by whom?

Answer 41

David Baltimore

Question 42

ICTV was established on what year?

Answer 42

1966

Question 43

What virus family is comprised of viral proteins and RNA

Answer 43

Picornaviridae

Question 44

RNA viruses has this property of its genomic nucleotide sequence is complementary to the mRNA

Answer 44

Negative sense

Question 45

Required by certain defective closely related viruses to replicate

Answer 45

Helper Virus

Question 46

This classification system is based on genome type and mode of replication and transcription

Answer 46

Baltimore Classification System

Question 47

TRUE or FALSE: Some viruses contain nucleic acid molecules other than their genomic DNA or RNA.

Answer 47

TRUE