The protein coat that encloses the genetic material of a virus is called the
- A. capsid
- B. capsomere
- C. envelope
- D. nucleoid
Explanation
The capsid is the complete protein shell around the viral nucleic acid, and it protects the genome and helps the virus attach to the host cell. A capsomere is only one of the repeating protein subunits from which that shell is assembled, so it is a part and not the whole. The envelope is an extra lipid layer present only in some viruses, and a nucleoid is the DNA region of a prokaryotic cell.
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