Virusis

Question 1

virus morphology:

Answer 1

very small, 10nm-.2

Question 2

Nucleocapsid includes:

Answer 2

nucleic acid, and capsid

Question 3

Nucleic acid:

Answer 3

viral genes made up of either DNA or RNA

Question 4

Capsid:

Answer 4

protein coat made up of subunits called capsomeres

Question 5

Envelope:

Answer 5

membrane stolen from host cell

Question 6

Envelope physiology (funtion):

Answer 6

None

Question 7

Envelope reproduction:

Answer 7

occurs only inside host cells and is called replication

Question 8

Envelope reproduction cycle:

Answer 8

attachment, penetration, uncoating, biosynthesis, maturation, release

Question 9

Attachment:

Answer 9

to receptor sites on host cell by spikes (peplomers)

Question 10

penetration:

Answer 10

entrance into host cell

Question 11

uncoating:

Answer 11

removal of capsids, frees viral genes to be expressed

Question 12

biosynthesis:

Answer 12

synthesis of viral DNA or RNA and proteins

Question 13

Maturation

Answer 13

Components assemble to form viral particles (virions)

Question 14

Release:

Answer 14

virions emerge from host cell by lysis or budding

Question 15

Importance and habitat of virus:

Answer 15

pathogenic; ubiquitous, function only in a living cell