Intro To Virology 1

Question 1

Are all of our cells able to contract a virus except red blood cells?

Answer 1

Yes

Question 2

Linnaean system is used to…

Answer 2

Classify viruses

Question 3

Why are viruses not cells?

Answer 3

Cant propagate independently
Only propagate inside living cells
Completely parasitic

Question 4

What are obligate intercellular parasites?

Answer 4

Viruses

Question 5

Viruses are not alive

Answer 5

Inert unless inside a permissive cell

Question 6

Viruses do not grow apart from expansion in rod or helical viruses

Answer 6

Fixed size

Question 7

Do viruses divide?

Answer 7

No
Duplicate their component bio molecules
They replicate

Question 8

Are viruses suseptible to antibiotics?

Answer 8

No

Question 9

Viruses have NO mitochondria

Answer 9

No biochemical energy machinery

Question 10

Viruses have no ribosomes

Answer 10

No protein synthesis machines

Question 11

Capsid

Answer 11

Hollow protein structure
Protects from desication , uv light
Bond to proteins on surface of cell

Question 12

Nucleocapsid

Answer 12

Complete binding of the helix of the genome with protein

Question 13

Enzymes

Answer 13

Proteins carried inside virion or encoded by genome

Question 14

Capsid helical shape

Answer 14

Rod shape

Question 15

Capsid icosahedral 20 triangular sides

Answer 15

Cone HIV, regular geometric shape, of 1,2,3 or more types of proteins

Question 16

Membrane envelope will have proteins encoded

Question 17

How do proteins get to a membrane?

Answer 17

Pass through ER and Golgi
Are modified
Generally glycosylated

Question 18

Membrane (envelope) have large..

Answer 18

Glycostructures on outside

Question 19

Glycoproteins are embedded in the…

Answer 19

Virion envelope

Question 20

Space between membrane and envelope of a virus is called…

Answer 20

Tegument (loose association)
Matrix (close-fitting structure (matrix)

Question 21

Genome show diversity in…

Answer 21

Size
Composition (RNA OR DNA. Single or multiple chromosomes)
Conformation (single or double stranded. Circular or linear)
Gene coding strategy (on both or 1 strand) positive, negative or ambi-sense
Gene copy number (haploid, merodiploid, diploid)

Question 22

Coding strand has a complimentary..

Answer 22

Template strand

Question 23

Gene-sense strand is

Answer 23

Positive - sense
Duplicated as messenger RNA
Take sequence to ribosomes

Question 24

Template strand / complementary strand carries the…

Answer 24

Reverse complement of the coding sequence (negative sense)

Question 25

Nucleotide sequence of coding region is referred to as…

Answer 25

SENSE

Question 26

In our cells we can only transcribe RNA from a DNA template

Answer 26

RNA polymerase work from DNA strand

Question 27

Viruses which are RNA strands have to have…

Answer 27

Their own version of RNA polymerase to make new RNA

Question 28

All viruses must replicate 2 complementary nuclei acid strands

Answer 28

Even if genome is single stranded

Question 29

Transcription begins at…

Answer 29

Promoter sequences

Question 30

Messenger RNAs have to be transcribed to make..

Answer 30

Proteins, then translated on ribosomes

Question 31

Depending on what enzymes used to make mRNA’s it will dictate…

Answer 31

How well they bind to ribosomes