GENERAL PROPERTIES OF VIRUS: 1. Acellular structure: They are acellular particles consisting of genetic materials [DNA &RNA] enclosed in a protein coat called capsids. Some viruses also consist of lipid envelopes obtained from the host. 2. Obligate intracellular parasites: They cannot reproduce or perform metabolic pathways independently. So, they require a host cell for replication and metabolic processes. 3. Genetic material: Viruses contain either DNA or RNA but not both. The genetic material can either be single-stranded or double-stranded. 4. Capsid: It helps in protecting the viral genome and helps in attachment to host cells. Capsids are made of protein subunits called capsomers. 5. Size: It is usually in 20 to 300 nanometers. e.g., smallest virus bacteriophage...