36. In generalized bacteriophage transduction A a small piece of bacterial chrom

Question

36. In generalized bacteriophage transduction A a small piece of bacterial chromsomal DNA (B any bacterial chromosomal gene can be transferred into a recipient bacteria is mistakenly packaged into the bacteriophage genome acter propellage is inserted within the host A and B bacterial cell chromosome E) A and B and C Non-specific clinical symptoms such as coughing, sneezing, fever, and malaise first appear during which stage of a viral infection? 537. prodromal period A incubation period c acute ilness period E persistent period D) convalescent periocd 38. Which of the following is TRUE concerning RNA virus replication? the virus uses a host cell RNA-dependent RNA polymerase to copy RNA from a viral RNA template B the viral replicase enzyme has proof- reading ability A c mutations occur more frequently in RNA viruses compared to DNA viruses most RNA viruses have a DNA intermediate in their replication cycle E) all of the above an en el plow ngtypesof suses utbreakisamplesarei oculate an enveloped virus with icosahedral ? 39. An outbreak of gastroenteritis occurs among adults onboard a cruise ship to Bemuda. An infectious agent cannot be identified when fecal samples are inoculated onto agar plates. An epidemiological study detemines the outbreak is associated with a contaminated water source. Which of the following types of viruses is the most likely cause of the outbreak? A B an enveloped virus with a RNA genome symmetry c) a naked virus with helical symmetry E) a virus with a DNA genome and complex a naked virus with icosahedral symmetry symmetry

Explanation / Answer

36. C

in bacteriophage trnsduction method , a virus first infects a bacteria. Next, the genomic DNA of bacteriophage passed into the bacteria and get integrated into bacterial genome.

39. D

In cruiseship generally the virus borne gastroenteritis are developed by Norovirus. This type of virus has no envelope and has icosohedral symetry.

37. A. incubation period

When a virus first infect a host cell, at initial stage the virus genome contnue to replicate. Now, when this replicating process in ongoing, the host cell also starts responding agaist the virus by means of producing cytokines. At this time the effects such as malaise, fever, coughing or pain occurs. This time period is called incubation period.

38. D

when a virus borne gastroentritis occus in a cruiseship, its mostly occurs by Norovirus. Norovirus do not have a envelope and has icosohedral symmetry.

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