Which viruses enter the host cell as a whole?
Correct answer: C. Animal virus
- A. Plant virus
- B. Bacteriophages
- C. Animal virus
- D. None of these
Explanation
Animal viruses can enter host cells as whole particles because animal cells lack rigid walls, using processes like membrane fusion or endocytosis before uncoating their genome. In contrast, plant viruses cannot enter as complete virions due to the tough cell wall; they depend on wounds or insect vectors to introduce only their genome. Bacteriophages also do not enter entirely-they attach to bacteria and inject their genetic material while the capsid remains outside.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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