CHS 200 QUIZ 6 QUESTIONS & ANSWERS
Capsid/nucleocapsid - Answers - Virus
Nucleus - Answers - Eukaryotic Cell
None/cell wall (free floats in cytoplasm) - Answers - Bacterial cell
One type of viruses, called [blank] become part of DNA in the host organism. About
[blank]% of the human genome is thought to be from such viruses! - Answers -
retroviruses, 8-10
Role of viral RNA polymerase in influenza - Answers - To make more virus DNA
Genetic result of limitation of RNA polymerase in influenza - Answers - Mutations
(because doesn't proofread replication)
Public health implication of the RNA polymerase weakness in influenza - Answers -
Need yearly booster shot
Antigenic drift - Answers - Seasonal outbreaks: ~1% change in amino acid sequence
Antigenic shift - Answers - Pandemics: ~20% change in amino acid sequence
Viruses cause fever, headache, and muscle aches because they cause the innate
immune system to produce what type of cells? - Answers - Cytokines
Please explain why antigenic drift is a good example of Darwinian evolution (1-3
sentences). - Answers - Antigenic drift is a good example of Darwinian evolution
because it shows that there is change every season of the virus through mutation which
can showcase natural selection through its survival due to mutation.
Because mutations occur randomly within the viral genome, but only those that confer a
selective/"survival" advantage to the virus grow in prevalence (a change in viral DNA of
about 1% year-to-year due to selective pressure by the hosts immune systems).
Describe what happened to the H1N1 influenza virus over time (hint: same thing
happened to the myxoma virus over time?) - Answers - Virus became more pathogenic,
less virulent
MRSA can easily be transferred from person to person by direct contact (e.g., bacteria
on the hands) or by contact with contaminated inanimate objects (such as bed linen,
medical instruments, and so forth). - Answers - True
The biggest concern for MRSA infection in the future is? - Answers - Community
spread
Capsid/nucleocapsid - Answers - Virus
Nucleus - Answers - Eukaryotic Cell
None/cell wall (free floats in cytoplasm) - Answers - Bacterial cell
One type of viruses, called [blank] become part of DNA in the host organism. About
[blank]% of the human genome is thought to be from such viruses! - Answers -
retroviruses, 8-10
Role of viral RNA polymerase in influenza - Answers - To make more virus DNA
Genetic result of limitation of RNA polymerase in influenza - Answers - Mutations
(because doesn't proofread replication)
Public health implication of the RNA polymerase weakness in influenza - Answers -
Need yearly booster shot
Antigenic drift - Answers - Seasonal outbreaks: ~1% change in amino acid sequence
Antigenic shift - Answers - Pandemics: ~20% change in amino acid sequence
Viruses cause fever, headache, and muscle aches because they cause the innate
immune system to produce what type of cells? - Answers - Cytokines
Please explain why antigenic drift is a good example of Darwinian evolution (1-3
sentences). - Answers - Antigenic drift is a good example of Darwinian evolution
because it shows that there is change every season of the virus through mutation which
can showcase natural selection through its survival due to mutation.
Because mutations occur randomly within the viral genome, but only those that confer a
selective/"survival" advantage to the virus grow in prevalence (a change in viral DNA of
about 1% year-to-year due to selective pressure by the hosts immune systems).
Describe what happened to the H1N1 influenza virus over time (hint: same thing
happened to the myxoma virus over time?) - Answers - Virus became more pathogenic,
less virulent
MRSA can easily be transferred from person to person by direct contact (e.g., bacteria
on the hands) or by contact with contaminated inanimate objects (such as bed linen,
medical instruments, and so forth). - Answers - True
The biggest concern for MRSA infection in the future is? - Answers - Community
spread
