MCQs

Reduced immunity allows infections to develop.

Reverse transcriptase synthesizes DNA from viral RNA.

HIV is classified as a retrovirus.

HIV is a retrovirus containing RNA and reverse transcriptase.

Long-lasting fever frequently occurs in AIDS patients.

Sexual contact is a major transmission route.

Blood contains sufficient viral particles for transmission.

HIV can spread through infected blood.

Loss of CD4 cells weakens immunity.

HIV specifically infects and destroys helper T cells.

HIV causes AIDS by attacking the immune system.

Phages mediate transduction, transferring genes between bacteria.

Plant cell walls hinder entry, making wounds important portals.

TMV capsid proteins are arranged helically around RNA.

Latency involves persistence of viral genome with minimal viral production.

Rabies virus shows strong neurotropism and damages nervous tissue.

Animal viruses commonly enter through receptor-mediated endocytosis or membrane fusion.

DNA or RNA nature is a fundamental basis for viral classification.

Most bacteriophages inject nucleic acid while the capsid remains outside.