Practice Questions

RNA polymerases lack proofreading ability, leading to frequent mutations.

Poxviruses possess a complex brick-shaped structure unlike simple helical or icosahedral forms.

Plant viruses often enter through injuries and are spread by insect vectors.

Capsomeres are repeating protein units that assemble into the viral capsid.

Hepatitis B virus is a DNA virus and an important human pathogen.

Tail fibers recognize and bind specific bacterial receptors.

Influenza virus contains a segmented RNA genome.

TMV exhibits a rigid rod-shaped helical symmetry.

Viruses depend entirely on host cellular machinery for replication.

Poliovirus belongs to the RNA viruses and contains positive-sense single-stranded RNA.