NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a surface protein.
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genetic material.
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a retrovirus.
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a bacteriophage.
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Detailed explanation-1: -Coronaviruses are the enveloped viruses which are composed of structural proteins such as spike (S), membrane (M), envelope (E), and nucleocapsid (N). The S proteins produces homotrimeric spikes on the surface of viral particles and promotes the endocytosis of virus into host cells.
Detailed explanation-2: -Viruses evolve to recognize specific cell surface receptor molecules appropriate for productive entry and infection of host cells, which frequently determines the host tropism or the cell type a virus can infect.
Detailed explanation-3: -Hence, viral protein synthesis is carried out on host cell ribosomes. Synthesis of viral membrane proteins occurs on membrane-bound ribosomes, from which they are inserted, always in the correct orientation, into the endoplasmic reticulum membrane.