Virus Structure and Classification

Question 1

What is the definition of a virus?

Answer 1

capsid-encoding organism

Question 2

Where must viruses be grown?

Answer 2

within cells

Question 3

What is a capsid?

Answer 3

protein shell which encapsulates the nucleic acid genome

Question 4

What is a virion?

Answer 4

the particle encoded by virus genome

Question 5

What are the three basic gene modules of all viruses?

Answer 5

1. capsid proteins
2. replicon = nucleic acid pol, accessory proteins (for replication)
3. multifunctional proteins for host interaction

Question 6

What are the two possible shapes of a capsid?

Answer 6

helical

icosahedral

Question 7

what surrounds an enveloped virion?

Answer 7

lipid bilayer

Question 8

What are the three components of viral classification?

Answer 8

host cell (kingdom)
genome type
virion structure

Question 9

Genome segments, nucleocapsid, capsid/core, tegument, matrix, envelope, glycoprotein, spike/fiber are all ______ components

Answer 9

virion

Question 10

What is the three-part strategy of a virus to ensure its survival?

Answer 10

capsid protects genome outside of cell
need to replicate, infect, survive in cell, assmeble virions and genome encodes all of this
transmit to new host