100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Virology Exam 2 UPDATED ACTUAL Exam Questions and CORRECT ANSWERS $9.99   Add to cart

Exam (elaborations)

Virology Exam 2 UPDATED ACTUAL Exam Questions and CORRECT ANSWERS

 3 views  0 purchase
  • Course
  • Virology
  • Institution
  • Virology

Virology Exam 2 UPDATED ACTUAL Exam Questions and CORRECT ANSWERS What type of virus is zika virus and how is it spread? - CORRECT ANSWER- Flavivirus family; spread by mosquitoes which statement about polyadenylation of DNA viruses mRNAs is correct? a. it always occurs in the cytoplasm b....

[Show more]

Preview 4 out of 39  pages

  • October 7, 2024
  • 39
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Virology
  • Virology
avatar-seller
MGRADES
Virology Exam 2 UPDATED ACTUAL
Exam Questions and CORRECT
ANSWERS
What type of virus is zika virus and how is it spread? - CORRECT ANSWER- ✔✔Flavivirus
family; spread by mosquitoes


which statement about polyadenylation of DNA viruses mRNAs is correct?


a. it always occurs in the cytoplasm
b. it occurs after cleavage of pre-mRNA
c. polyA is added at the 5' end of pre-mRNA

d. is specified by a stretch of U residues in the template - CORRECT ANSWER- ✔✔b


adenovirus E1A protein stimulating the expression of adenovirus E2 protein which then
stimulates the expression of adenovirus IVa2 and L4 protein is an example of:


a. a negative auto regulatory loop
b. repression of gene expression
c. cascade regulation

d. dimerization - CORRECT ANSWER- ✔✔c



What serum samples do zika virus cross react with? - CORRECT ANSWER- ✔✔dengue,
yellow fever, and CHIK (makes prevalence of zika difficult to nail down)


Zika virus effect on pregnant woman: - CORRECT ANSWER- ✔✔may be passed from
mother to child and cause birth defect microcephaly (small head); studies suggest infection
during 1st trimester leads to the defects


List zika virus virology info. - genome, structure, entry mechanism, and transcription -
CORRECT ANSWER- ✔✔-genome: (+)ssRNA

,-structure: enveloped icosahedral


-entry: receptor mediated endocytosis and low-pH induced fusion


-transcription: mRNA genome is immediately translated into 1 large polypeptide that is
cleaved by cellular & viral enzymes into individual proteins


Where was the largest outbreak of zika virus obsered? - CORRECT ANSWER- ✔✔brazil



How does zika virus enter the human population? - CORRECT ANSWER- ✔✔warm, urban
environments with standing pools of water attracts mosquitoes can lead to spread of virus
(biting ppl), possible that zika can be transmitted via sexual intercourse, blood transfusion, &
in utero


cycle where mosquitos feed on monkeys that are infected and the virus goes back and forth
between monkey and mosquito - CORRECT ANSWER- ✔✔sylvatic cycle


cycle where mosquito finds a human to feed on and transmits a virus to a human -
CORRECT ANSWER- ✔✔urban cycle



Where does zika virus originate? - CORRECT ANSWER- ✔✔nonhuman primates in tropical
rain forests


Zika is considered a _____ virus because it is transmitted via an insect vector - CORRECT
ANSWER- ✔✔Arthropod- Borne



an ___ is an arthropod-borne virus - CORRECT ANSWER- ✔✔arbovirus



What species of mosquito carries zika virus? - CORRECT ANSWER- ✔✔aedes aegypti,
aedes albopictus, yellow fever mosquito


two examples of an arthropod that can carry an arbovirus - CORRECT ANSWER-
✔✔mosquito, tick (sandflies, aphids)

,Describe a mosquito becoming a carrier of zika virus: - CORRECT ANSWER- ✔✔bite -->
saliva numbing --> intake an infected blood meal --> virus infects midgut cells --> virus
spreads to hemolymph --> virus reaches salivary glands & replicates


Describe mosquito transmitting zika virus to human: - CORRECT ANSWER- ✔✔infected
mosquito bites human --> injects saliva+zika --> zika enters human


How long does it take for a mosquito to become infectious with zika virus? - CORRECT
ANSWER- ✔✔3-10 days



why are arbovirus infections a long process? - CORRECT ANSWER- ✔✔the virus needs to
fully replicate in a mosquito before it infects a human


Why do only female mosquitos bite humans? - CORRECT ANSWER- ✔✔they require a
blood meal to produce eggs


Zika virus symptoms, prevention, and treatment: - CORRECT ANSWER- ✔✔symptoms:
fever, headache, red eyes, skin rash, fatigue, joint pain


prevention: bug spray,cover water sources, insect screens


treatment: hydration


What virus is zika virus most similar to? - CORRECT ANSWER- ✔✔dengue virus



Most cases of zika virus are _____ - CORRECT ANSWER- ✔✔asymptomatic


During what year did US territories experience the most explosive zika virus outbreak? -
CORRECT ANSWER- ✔✔2016



how did zika virus enter the US? - CORRECT ANSWER- ✔✔people traveling from areas
with zika (most people are asymptomatic, so they don't know they are infected)

, what factor helps break the transmission cycle of zika in the US? - CORRECT ANSWER-
✔✔people don't spend as much time outside



Describe ebola virus symptoms and spread: - CORRECT ANSWER- ✔✔Symptoms: blood in
vomit or diarrhea, skin rash, fever, muscle/joint pain


Spread: fruit eaten by infected animals, infected medical equipment, contact w/ infected ppl
or animals, infected stool or urine


Ebola Virus virology info. - genome, structure, entry mechanism, and transcription -
CORRECT ANSWER- ✔✔(pua virus family)


genome: (-)ssRNA


structure:


entry mechanism: macropinocytosed into cell (too big to be endocytosed), low pH causes
confirmational changes


transcription: m


How deadly is ebola virus? - CORRECT ANSWER- ✔✔50-90% of infected people die (due
to high loss of fluids)


What is the incubation period for ebola virus? - CORRECT ANSWER- ✔✔2-21 days (not
contagious until symptoms begin to show)


true/false:
you can transmit ebola even if you don't show any symptoms - CORRECT ANSWER-
✔✔false


true/false:

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller MGRADES. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $9.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

84146 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$9.99
  • (0)
  Add to cart