Chapter 5/8: Virus Structure

Question 1

What tool is used in first step of identification of viruses?

Answer 1

Electron microscopy

Question 2

What term is used to describe the fact that viruses require hosts?

Answer 2

Intracellular obligate parasites

Question 3

What size are viruses?

Answer 3

10nm to 100nm

Question 4

What is the capsid made of?

Answer 4

Capsomere proteins

Question 5

What is the term to describe the capsid and genome together?

Answer 5

Nucleocapsid

Question 6

What is the plasma membrane external to the capsid in viruses called?

Answer 6

Envelope

Question 7

What different types genomes exist in viruses?

Answer 7

ssDNA, dsDNA, (+/-) ssRNA, dsRNA

Question 8

What type of symmetry is found in poliovirus capsids?

Answer 8

Icosahedral

Question 9

What type of symmetry is found in T4 bacteriophage and Pox

Answer 9

Complex

Question 10

What type of symmetry is found in Tobacco Mosaic Virus

Answer 10

Helical

Question 11

What term describes if a plasma membrane surrounds the nucleocapsid?

Answer 11

Enveloped

Question 12

What term is describes if there is no plasma membrane on a virus?

Answer 12

Naked