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Q: The chemical component that is invariably found in all viruses is:
  • A. proteins
  • B. lipids
  • C. DNA
  • D. RNA
Correct Answer: Option A - All viruses contain the following two components–a nucleic acid genome and a protein capsid that covers the genome proteins is invariably found in all viruses. Together this is called nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope.
A. All viruses contain the following two components–a nucleic acid genome and a protein capsid that covers the genome proteins is invariably found in all viruses. Together this is called nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope.

Explanations:

All viruses contain the following two components–a nucleic acid genome and a protein capsid that covers the genome proteins is invariably found in all viruses. Together this is called nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope.