Question

Which of the following is incorrect about viruses?

• A. Viruses use host machinery to produce more of their kind.
• B. Viruses have either DNA or RNA as the genetic material.
• C. Viruses do not infect bacteria, fungi, and algae.
• D. Viruses are useful in the preparation of vaccines.

Answer 1

The correct option is C Viruses do not infect bacteria, fungi, and algae.

$\bullet$ Viruses are microscopic entities that exist as a living unit only when they are inside the body of a living host organism.
$\bullet$ The host organism could be a bacterium, a fungus, an alga, a plant or an animal.
$\bullet$ Viruses lack the cellular machinery required for replication. So, they depend on the host organism to produce more of their kind.
$\bullet$ Viruses have either DNA or RNA as their genetic material. No virus contains both DNA and RNA.
$\bullet$ They are useful in the preparation of vaccines for diseases like chickenpox and smallpox.