Chapter 6 - Viruses and Other Acellular Infectios Agents

Question 0

these viruses only have RNA

Answer 0

viroids, virusoids

Question 1

protein and nucleic acid make up blank

Answer 1

viruses

Question 2

a complete virus particle

Answer 2

virion

Question 3

additional layers of viruss

Answer 3

envelope

Question 4

viruses must be viewed with a blank microscope

Answer 4

electron

Question 5

virions with enveloped are called

Answer 5

enveloped viruses

Question 6

virions lacking envelopes

Answer 6

naked viruses

Question 7

viral genome can be blank or blank

Answer 7

linear, circular

Question 8

capsids are made of blank and blank

Answer 8

protomers, capsomeres

Question 9

capsid shaped like hollow tubes with protein walls

Answer 9

helical capsid

Question 10

regular polyhedron with 20 equilateral faces and 12 vertices

Answer 10

icosahedral

Question 11

5 subunit capsomers

Answer 11

pentamers

Question 12

6 subunit capsomers

Answer 12

hexamers

Question 13

ring or knob shaped units made of 5 or 6 protomers

Answer 13

capsomers

Question 14

virus blank proteins may blank from the envelope like spikes

Answer 14

envelope, project

Question 15

a virus must attach to a blank before it can function

Answer 15

host cell

Question 16

attachment of viruses to cells is a blank process

Answer 16

receptor mediated

Question 17

sometimes viruses just blank their nucleic acids into the cell

Answer 17

inject

Question 18

three methods of virus entry and uncoating

Answer 18

endocytosis of virus, injection of nucleic acid, fusion of viral envelope to host membrane and nucleocapsid enters

Question 19

these are important in assembly and maturation of virus

Answer 19

late proteins

Question 20

nonenveloped viruses blank the host cell

Answer 20

lyse

Question 21

enveloped viruses use blank

Answer 21

budding

Question 22

virus with one reproductive choice

Answer 22

virulent phage

Question 23

these viruses have two reproductive options

Answer 23

temperate phages (lysogenic)

Question 24

attachment that is receptor mediated is also called

Answer 24

ad or absorption

Question 25

this infection results in cell death through lysis

Answer 25

cytocidal

Question 26

these infections are due to dormant viruses

Answer 26

latent

Question 27

localized area of cellular destruction and lysis that enlarge as the virus replicates

Answer 27

viral plaques

Question 28

counting viral particles via electron microscope

Answer 28

direct counting

Question 29

plaque assays and counting an observable trait in viruses are methods of blank

Answer 29

indirect counting

Question 30

dilutions of virus preparation made and plated on lawn of host cells

Answer 30

plaque assays

Question 31

infectious agents composed only of closed, circular ssRNAs, and not supercoiled

Answer 31

viroids

Question 32

viroids do not blank gene products

Answer 32

encode

Question 33

these are much like viroids but encode one or more gene products instead of none

Answer 33

virusoids

Question 34

these cause a variety of degenerative diseases in humans and animals

Answer 34

prions