Ch. 5

Question 1

Viruses without an envelope are called_____?

Answer 1

Naked Viruses

Question 2

A virus has a protein shell called a _____ that protects the nucleic acid.

Answer 2

Capsid

Question 3

All viruses must infect a host in order to replicate so they are called _________

Answer 3

Obligate Intracellular Parasites

Question 4

List the 3 ways viruses are classified

Answer 4

Genetic Makeup
Chemical Composition
Structure

Question 5

Phases of the life cycle of an animal virus

Answer 5

Adsorption
Penetration & Uncoating
Synthesis
Assembly
Release

Question 6

Virus induced damage to a cell that alters it’s microscopic apearance

Answer 6

Cytopathic Effect

Question 7

Two ways an animal virus penetrates

Answer 7

Endocytosis (engulfment) & Fusion of the cell membrane with the viral envelope

Question 8

A cytopathic effect where multiple host cells fuse into 1 large cell with many nuclei

Answer 8

syncytia

Question 9

When a cell harbors the virus and is not immediately lysed

Answer 9

persistent infection

Question 10

When viral DNA is incorporated into the host’s DNA

Answer 10

Provirus

Question 11

Infectious agent that is primarily composed of protein (no nucleic acid)

Answer 11

prions

Question 12

Phage DNA that is latently incorporated into the bacterial host genome is called a ______

Answer 12

Prophage

Question 13

Term for a virus that can cause cancer

Answer 13

oncovirus

Question 14

Name the 2 virus types that are released from the host cell by lysis

Answer 14

Naked and Complex

Question 15

The total sum of the genetic information carried by an organism is called a _______

Answer 15

Genome

Question 16

Name the 3 capsid structures

Answer 16

Helical
Icosahedral
Complex

Question 17

Compacted masses of viruses and damaged organelles, found in the nucleus and cytoplasm are called _______

Answer 17

Inclusion Bodies

Question 18

When host chromosome carries bacteriophage DNA it is termed ______

Answer 18

Lysogeny