MCQs

TMV is a classic plant virus containing single-stranded RNA enclosed in a helical capsid.

Bacteriophages are viruses specialized to infect bacterial cells.

Capsid protects the viral genome and helps in host recognition. Envelope is an additional structure found only in some viruses.

A virus contains either DNA or RNA as genetic material but never both simultaneously.

Viruses can reproduce only inside living host cells because they lack independent metabolic machinery.

Viruses lack cellular organization and consist mainly of nucleic acid enclosed by a protein coat, making them acellular infectious particles.

Capsid is the protein coat that surrounds viral nucleic acid and is present in all viruses. Ribosomes, cytoplasm, and true cellular membranes are absent in all viruses.