Unit 3: viruses

Question 1

2 essential parts of virus

Answer 1

protein coat

genome

Question 2

purpose of protein coat

Answer 2

called capsid, package and protect genomic material

Question 3

what is a genome

Answer 3

composed of nucleic acids, sd dna, ds dna, ss rna, ds rna

Question 4

2 optional parts of a virus

Answer 4

viral envelope

accessory proteins

Question 5

what is a viral envelope

Answer 5

outer membrane of phospholipids and proteins, stolen from host, still has viral glycoproteins
disguise virus as cell and functions invade host

Question 6

what is accessory proteins

Answer 6

proteins essential for viral life cycle
not all viruses need
help virus carry out job
allows virus to do things host can’t do

Question 7

protein coat purpose

Answer 7

protect DNA

Question 8

genome purpose

Answer 8

genes for capsid, spike protein

Question 9

spike protein purpose

Answer 9

get into host cell

Question 10

capsomere

Answer 10

monomers that make capsid

Question 11

how do virus replicate

Answer 11

lysogenic/temperant and lytic/virulent

Question 12

purpose of lysogenic/temperant

Answer 12

virus can go dorment until ready

Question 13

purpose of lytic/virulent

Answer 13

virus kills host right away

Question 14

steps for all virus

Answer 14

1. attachment
2. entry
3. synthesis
4. assembly
5. release

Question 15

what steps does lysogenic/temperate have that are new

Answer 15

integration

activation

Question 16

virus can can do 3 things to stay alive

Answer 16

1. fast mutation rate
2. fast replication rate
3. virus uses host machinery so its hard to make antivirals

Question 17

vaccine do what

Answer 17

destroy virus
part of virus
can’t give you the illness
vaccines are preventative doesn’t cure it