You recovered an animal virus particle from drain water When

You recovered an animal virus particle from drain water. When tested in tissue culture, the virus infected cells. The virus particle most likely has a _________ capsid. A. naked helical

B. naked icosahedral

C. enveloped icosahedral

D. enveloped helical

E. naked icosahedral or naked helical

Solution

Answer: E. naked icosahedral or naked helical

Reason:

Several families of animal viruses often contain either naked icosahedral or naked helical symmetry because these are non-enveloped & have ability to infect cells in the tissue culture. These can be examined by collecting water sample from drainage or sewage using tissue culture procedure. Rotaviruses and picarnoviruses have ability to contaminate through feces and water they do possess either non-enveloped icosahedral or naked helical that have ability to infect animal cells

Norovirus, rotavirus is one of RNA dependant (molecular background) viruses with Non-Enveloped capsid & Icosahedral structurae along with monopartite segmentation. These viruses are going to cause gastroentiritis (disease) and these are transmitted via, fecal–oral route from person to person by either food or water.