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Q23 (CDS-I/2006) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Microbiology and immunity Answer Verified

Consider the following 1. Nucleic acids 2. Carbohydrates 3. Proteins A virus is made up of which of the above ?

Result
Your answer: —  Â·  Correct: C
Explanation

The correct answer is Option 3 (1 and 3 only) because of the fundamental structural composition of a virus.

A virus is a submicroscopic infectious agent consisting primarily of two components:

  • Nucleic Acids: Every virus contains a genetic blueprint, which can be either DNA or RNA (but never both). This forms the core of the viral particle.
  • Proteins: The genetic material is encased in a protective protein shell called a capsid. Some viruses also possess protein spikes for host cell attachment.

While some complex viruses have a lipid envelope derived from the host cell membrane, carbohydrates are not a primary structural building block of a virus. Unlike cellular organisms, viruses lack a metabolism and do not utilize carbohydrates for energy or structural integrity. Therefore, while nucleic acids and proteins are essential to all viruses, carbohydrates are not, making 1 and 3 the only correct constituents among the choices provided.

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