front 1 Obligatory intracellular parasites | back 1 Require living host cells to multiply, • Contain DNA or RNA • Contain a protein coat • No ribosomes • No ATP-generating mechanism |
front 2 Host Range | back 2 • The spectrum of host cells a virus can infect • Most viruses infect only specific types of cells in one host – Determined by specific host attachment sites and cellular factors |
front 3 Bacteriophages | back 3 viruses that infect bacteria • Range from 20 nm to 1000 nm in length |
front 4 Virion | back 4 complete, fully developed viral particle Nucleic acid—DNA or RNA can be single- or doublestranded; linear or circular |
front 5 Capsid | back 5 protein coat made of capsomeres (subunits) |
front 6 Envelope | back 6 lipid, protein, and carbohydrate coating on some viruses |