Viruses are limited in their host range because
Correct answer: C. They can only enter cells that have proper/specific receptors.
- A. Can only replicate in certain types of cells.
- B. Certain cells are susceptible to viral infection.
- C. They can only enter cells that have proper/specific receptors.
- D. They can only enter cells with glycoproteins.
Explanation
Viruses have a limited host range because they cannot infect all cells. While they need specific cellular conditions for replication (Option A) and not all cells are equally susceptible (Option B), the key factor is the presence of the right cell surface receptors (Option C) that allow viral entry. Option D is only partly correct, since not all viral receptors are glycoproteins. Therefore, the limitation of host range is primarily due to receptor specificity.
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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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