Lecture7: Viral Structure And Classification

Question 1

What are viruses diameter

Answer 1

20-400nm

Question 2

What covers the nucleocapsid?

Answer 2

Matrix protein

Question 3

What does the matrix protein do?

Answer 3

Serves as a bridge for the envelope

Question 4

What are viruses lacking envelope called?

Answer 4

Naked viruses

Question 5

Which virus type contains two identical copies of its genome?

Answer 5

Retroviruses such as HIV

Question 6

What are enveloped viruses liable for?

Answer 6

Destruction via heat, ethanol, detergents

Question 7

What are defective viruses?

Answer 7

Viruses that lack a complete genome, thus can’t replicate

Question 8

What are Satellite Viruses?

Answer 8

A type of defective viruses, only capable of replication when a helper virus is present

Question 9

Name a Satellite Virus

Answer 9

Hepatitis D

Question 10

What virus type is liable for heat damage?

Answer 10

Enveloped viruses

Question 11

What pH is the stable value for viruses?

Answer 11

5-9

Question 12

What pH destroys all viruses?

Answer 12

Alkaline

Question 13

What is the best-in-class virus purification method?

Answer 13

Formaldehyde

Question 14

What are alcohols ineffective against?

Answer 14

Picornaviruses

Question 15

What’s a bacteriophage?

Answer 15

A virus-eating bacteria

Question 16

When a phage is integrated into a bacterial genome it’s called a..?

Answer 16

Prophage

Question 17

What do the tails of a phage do?

Answer 17

Inject nucleic acid into a host cell

Question 18

What are Lytic Phages

Answer 18

They kill their host cells

Question 19

What state do Temperate phages enter?

Answer 19

Nonlytic prophage state

Question 20

Name a temperate phage

Answer 20

E.coli phage

Question 21

Why phage therapy?

Answer 21

Strong host specificity, and new infectivity, meaning they don’t get resistant like antibiotic immunity and no collateral damage, very accurate

Question 22

What is a complete virus particle called?

Answer 22

Virion