W3-2 Virus intro Flashcards Preview

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Flashcards in W3-2 Virus intro Deck (14):
1

Classification system we use for viruses

Baltimore Classification System

2

What procedure do we use to count the number of virus particles present?

Plaque assay procedure

3

4 parts of eukaryotic viruses

1. Nucleic acid
2. Capsid
3. Tegument (maybe)
4. Envelope (maybe)

4

Name of extracellular form of virus

virion

5

What is a naked virus?

Without tegument and envelope

6

What is a virus that infects bacteria called?

bacteriophage

7

Are bacteriophages naked or enveloped viruses?

naked

8

Crick's two biggest mistakes

1. taking credit from Franklin
2. central dogma of molecular biology

9

5 steps of viral replication cycle

1. Attachment
2. Injection
3. Protein and NA synthesis
4. Assembly
5. Release/lysis

10

Class I example

Herpesvirus (dsDNA)

uses host cell's translation mechanism

11

Class IV example

Picrornaviruses (poliovirus)
RNA (+) sense

12

Class V example

Orthomyxoviruses (influenza)
ssRNA (-) sense

13

Lysis vs. Lysogeny

Lysis: releases cell contents

Lysogeny: latent period in cell (not all have this)

14

Danger of viruses and antibiotic resistance

Viruses may confer virulence factors to bacteria