Introduction To Virus

Question 1

Any of various simple submicroscopic obligate parasites of plants, animals, and
bacteria?

Answer 1

Virus

Question 2

They are classified as functionally
_____ or _______.

Answer 2

active, inactive

Question 3

Virus consists of its _____ or essentially of a core of _____, surrounded by a protein coat called _____?

Answer 3

Genome, RNA or DNA, caspid

Question 4

Is the viral genome (viral DNA or RNA) + protein coat (capsid)?

Answer 4

Nucleocapsid

Question 5

It can posses an outer membrane covering the capsid?

Answer 5

Enveloped virus

Question 6

can be non-enveloped viruses?

Answer 6

Naked Viruses

Question 7

Virus family has the suffix _____?

Answer 7

-viridae

Question 8

The protein shell or coat surrounding the viral genome (viral RNA or DNA)?

Answer 8

Caspid

Question 9

3 types of caspid symmetry?

Answer 9

Icosahedral
Helical
Complex

Question 10

The capsid proteins are arranged in equilateral triangles that
enclose the viral genome?

Answer 10

Icosahedral

Question 11

The capsid proteins are arranged around the core in a spiral
manner?

Answer 11

Helical

Question 12

Virus cannot reproduce on their own. They must invade a cell, take over the cell’s
machinery and instruct the machinery to produce enzymes and new viral structural
protein.

Answer 12

Viral Replication

Question 13

6 steps of viral replication?

Answer 13

1. Absorption
2. Penetration
3. Uncoating
4. Synthesis of viral nucleic acid and structural protein
5. Assembly/maturation
6. Release

Question 14

The first step in infection of a cell is attachment to the cell surface. This is a very
specific process in which the viral surface structure interact to a particular
receptor the cell surface of the host cell.

Answer 14

Absorption

Question 15

The virus enters the cell either by: Fusing with the plasma membrane, Endocytosis, or Fusing with the plasma membrane and injecting its genome to the host cell?

Answer 15

Penetration

Question 16

A virus that infects bacteria?

Answer 16

Bacteriophage

Question 17

The viral genome is released from the capsid into the cytoplasm or directly into
the nucleus?

Answer 17

Uncoating

Question 18

New virus particles (virions) are assembled?

Answer 18

Assembly/maturation

Question 19

Other term for cell rapture?

Answer 19

Cell Lysis

Question 20

The virion will tear off a piece of the host’s cell membrane as it exits which
will become the envelope of the newly formed virus?

Answer 20

Bud form

Question 21

The last step of virus reproduction where it can undergo either through cell lysis or bud form?

Answer 21

Release

Question 22

The Two modes of Viral Replication:

Answer 22

1. Lytic cycle
2. Lysogenic cycle

Question 23

The virus enters the cell, replicates itself hundreds of times using
the host cell machinery, and then bursts out of the cell, destroying it.?

Answer 23

Lytic cycle

Question 24

Virus genome that attaches itself to the host DNA and,
replicates when the host cell divides?

Answer 24

Lysogenic cycle

Question 25

Causes no harm to the host cell, an induction event, such as exposure to ultraviolet light, can cause this latent stage to enter the lytic cycle?

Answer 25

Lysogenic cycle

Question 26

Is based on the nucleotides in the virus, its mode of replication, the structure and symmetry of the structural proteins (capsids) and the presence or absence of an envelope?

Answer 26

Viral Replication

Question 27

Two types of DNA virus?

Answer 27

1. Double-stranded DNA 2. Single stranded DNA

Question 28

Two types of RNA virus?

Answer 28

1. RNA sense 2. RNA antisense

Question 29

Viruses include poxviruses, herpesviruses, adenoviruses, papovaviruses and polyomaviruses?

Answer 29

Double-stranded DNA

Question 30

viruses include parvoviruses. DNA viruses usually replicate in the nucleus of host cells by producing a polymerase that reproduces viral DNA. Viral DNA is not usually incorporated into host chromosomal DNA?

Answer 30

Single-stranded DNA

Question 31

May serve directly as mRNA and be translated into structural protein and an RNA-dependent RNA polymerase.

Answer 31

RNA sense

Question 32

Contains an RNA-dependent RNA polymerase that transcribes the viral genome into mRNA. Alternatively, the transcribed RNA can act as a template for further viral (antisense) RNA.

Answer 32

RNA antisense