In viruses, a combined structure formed by the core (nucleic acid) and the capsid is:
Correct answer: A. Nucleocapsid
- A. Nucleocapsid
- B. Envelope
- C. Capsomeres
- D. Prions
Explanation
Option A is correct. A nucleocapsid is the complex of viral nucleic acid (genome) and protein coat (capsid) that protects the genome and directs replication. Option B, the viral envelope, is a lipid bilayer derived from the host cell membrane and not the nucleocapsid. Option C, a capsomere, is just a protein subunit of the capsid, not the entire nucleocapsid. Option D, prions, are infectious proteins without nucleic acids and thus unrelated to nucleocapsids.
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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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