Question 27 2 pts Which of the following statements correctly describes the most

Question

Question 27 2 pts Which of the following statements correctly describes the most probable fate of a newly emerging virus that causes high mortality in its host? O Sporadic outbreaks will be followed almost immediately by a widespread pandemic O It is able to spread to a large number of new hosts quickly because the new hosts have no immunological memory of them O The new vinus replicates quickly and undergoes rapid adaptation to a series of divergent O The newly emerging virus will die out rather quickly or will mutate to be far less lethal. D Question 28 2 pts Some viruses can'lead to cancer, by altering the host s DNA. Which could be a mechanism for this to happen? O The virus enters the host cell and immediately kills it O The virus has a lytic cycle O The virus inserts its DNA into the host s DNA aitering the host s genome O The virus produces more viruses that get inserted in to new cells

Explanation / Answer

27. The new virus replicates quickly and undergoes rapid adaptation to a series of divergent host.

One of the cause of success of virus is its ability to quickly adapt itself within the host so that it can quickly replicate.

28. The organisers its DNA into host DNA altering hosts genome.

Virus carry Proto oncogenes which are inserted within the host genome where they are converted into oncogenes responsible for causing cancer.

29. Their RNA is reverse transcribed into DNA by reverse transcriptase.

Formation of DNA using RNA as template by some viruses is called as reverse transcription.

30. Immediately kills the host.

HIV has a very long incubation period ranging from months to years during which it replicates within the host cells.

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