Question

Viruses multiply

• A. In vivo
• B. In vitro
• C. Both A and B
• D. None of the above

Answer 1

The correct option is A In vivo

Viruses multiply invivo. It means they multiply inside living cells because viruses do not have the 'machinery' to make copies of themselves.

Viruses inject their genetic material (DNA or RNA) into the host cell and utilizes the host cell's synthetic machinery. The host cell's ribosomes - along with the host cell's tRNA's, amino acids synthesize new proteins that will make up the viral capsids. The host cell's RNA primase, polymerases, free nucleotides, etc. are used to synthesize new DNA (or RNA) that will make up the hundreds or thousands of new virus's genomes.