Exam #3

Question 1

viruses

Answer 1

obligatory intracellular parasites; they absolutely require living host cells in order to multiply

Question 2

intracellular parasite

Answer 2

typical bacteria: no
rickettsias/chlamydias: yes
viruses: no

Question 3

plasma membrane

Answer 3

typical bacteria: yes
rickettsias/chlamydias: yes
viruses: no

Question 4

binary fission

Answer 4

typical bacteria: yes
rickettsias/chlamydias: yes
viruses: no

Question 5

pass through bacteriological filters

Answer 5

typical bacteria: no
rickettsias/chlamydias: no/yes
viruses: yes

Question 6

possess both dna and rna

Answer 6

typical bacteria: yes
rickettsias/chlamydias: yes
viruses: no

Question 7

atp-generating metabolism

Answer 7

typical bacteria: yes
rickettsias/chlamydias: yes/no
viruses: no

Question 8

ribosomes

Answer 8

typical bacteria: yes
rickettsias/chlamydias: yes
viruses: no

Question 9

sensitive to antibiotics

Answer 9

typical bacteria: yes
rickettsias/chlamydias: yes
viruses: no

Question 10

sensitive to interferon

Answer 10

typical bacteria: no
rickettsias/chlamydias: no
viruses: yes

Question 11

multiplication of viruses

Answer 11

multiply using synthesizing machinery of cell due to lack of enzymes for protein synthesis and atp generation

Question 12

host range

Answer 12

the spectrum of host cells the virus is able to infect

Question 13

bacteriophages/phages

Answer 13

viruses that infect bacteria

receptor site is part of the cell wall or fimbriae

on animal viruses, the receptor sites are on the plasma membrane of host cells

Question 14

virion

Answer 14

complete, fully developed infectious viral particle composed of nucleic acid and surrounded by protein coat outside of host cell

Question 15

nucleic acid

Answer 15

viral genes encoded by either dna or rna but never both

Question 16

human virone

Answer 16

viral portion of microbiome; humans harbor up to 10 permanent infectious viruses

Question 17

capsid

Answer 17

protein coat that protects the nucleic acid of a virus; made of capsomeres

Question 18

envelope

Answer 18

capsid covered by an envelope; lipids + proteins + carbs

Question 19

spikes

Answer 19

carp-protein complexes apart of the enveloped that attach to the host