Practice Questions

Human Papillomavirus infects epithelial tissues and is responsible for warts and cervical cancer.

Complex viruses, particularly bacteriophages, possess specialized structures like heads, tails, and tail fibers for host attachment.

TMV has a rod-shaped appearance due to its helical arrangement of capsid proteins around the RNA genome.

Coronaviruses possess one of the largest positive-sense single-stranded RNA genomes among viruses.

Baltimore Group III viruses contain double-stranded RNA genomes and require viral RNA-dependent RNA polymerase for replication.

Poliovirus infects motor neurons and may cause poliomyelitis, leading to paralysis in severe cases.

Naked viruses lack a lipid envelope, making them more resistant to drying, acids, and detergents than enveloped viruses.

Viral glycoproteins embedded in the envelope recognize host receptors and facilitate membrane fusion during infection.

Bacteriophages are highly specific viruses that infect bacteria and cannot infect plant or animal cells.

DNA viruses contain DNA as their genetic material, whereas RNA viruses contain RNA. A virus never contains both DNA and RNA simultaneously.