Structure of animal viruses

Question 1

What is the size of viruses?

Answer 1

tiny-most not visible under light microscope

Question 2

What is the genetic material of animal viruses?

Answer 2

nucleic acids (RNA or DNA)
amount varies 

it will RNA or DNA not both as genetic material

Question 3

What are the components of a virus?

Answer 3

Capsid-capsomers

Envelope- F & M proteins

Question 4

What forms a capsid?

Answer 4

protein subunits called structural units or capsomers.

Question 5

what is the function of the capsid?

Answer 5

Protects the enclosed nucleic acid

Question 6

What are the different types of capsids?

Answer 6

complex-(poxvirus)
icosahedral- (Solid w/ 20 triangular faces, 12 vertices, 2, 3, 5 fold symmetry)

helical-helical morphology

Question 7

Where is the envelope?

Answer 7

surrounds nucleocapsid

Question 8

What is the envelope formed from?

Answer 8

modified host cellular membrane.

Contains host derived phospholipid bilayer

virus-derived proteins and glycoproteins-for attachment and viral fusion

Question 9

What are Matrix (M) proteins?

Answer 9

found associated with the inner layer of the envelope. Aid in viral structure. Help gives structure to membrane

Question 10

What are fusion (F) proteins?

Answer 10

are found on the envelope surface, they cause viral membranes to fuse with cellular membranes. – helps virus enter the host cell

Question 11

Naked virus or enveloped virus more susceptible to disinfectants?

Answer 11

Enveloped is more susceptible to disinfectants

because disinfectants strip away proteins and lipids that are essential for the virus to function