L30_Virus Structure and Classification Flashcards Preview

Microbiology > L30_Virus Structure and Classification > Flashcards

Flashcards in L30_Virus Structure and Classification Deck (16):
1

What were viruses originally known as when they were first discovered?

Filterable Agents (Not trapped by filter that normally sterilizes liquid)

2

What is a Capsid?

The protein shell that encapsulates the nucleic acid genome.

3

What is a Virion?

the particle encoded by a virus genome

4

What is the definition of a virus?

A capsid-encoding organism

5

What type of parasites are viruses?

Obligate intracellular parasites

6

What are the three things encoded on a virus genome?

Capsids (structural protein), Replicon (Machinery needed to replicate its RNA or DNA), Host Cell interacting factors (help keep virus alive, non-structural proteins)

7

What are the three different classes of capsid shapes?

Helical, Iscosahedral, complex

8

Do all viruses have an envelope?

NO

9

Where do viruses obtain envelope?

Host Cell membrane

10

Is the capsid shape dependent on the genome type?

NO

11

What are three major categories used to classify viruses?

Host Cell, Genome Type, Virion Structure

12

What is the 3 part strategy to ensure survival that all viruses use?

1 genome encodes a capsid that protects virion outside of cell
2 Genome contains info for infecting cell, replicating genome, intracellular survival, and assembling virions
3 Transmission to a new host is required to maintain the virus as a species

13

List the following structures from the inside to outside of virus: Matrix, Nucleocapsid, Capsid or Core, Tegument, Envelope, Spike or Fiber, Glycoprotein, Genome Segments.

1 Genome segments
2 Nucleocapsid (Protein that coats genome)
3 Capsid or Core
4 Tegument
5 Matrix
6 Envelope
7 Glycoprotein
8 Spike or Fiber

14

Adenovirus virion structure, geneome, envelope

icosahedral, dsDNA, naked

15

Influenza virion structure, geneome, envelope

Helical, segmented RNA, enveloped

16

Herpesvirus virion structure, genome, envelope

Icosahedral, dsDNA, enveloped