Biology, Pages 334-346

addition agent AIDS animal viruses appear associated bacteriophage bacterium begins biological called capsid carried cause cause disease cell's cellular Chapter chromosome circular cold coli colorized common complex Concept consisting contain cytoplasm damage depend derived double drugs effective emerging enters envelope enzymes eukaryotes example expression favors Figure filter functions genes genetic glycoproteins host cell human immune important instance isolated kill known laboratory leaves lysogenic cycle lytic cycle mechanisms membrane molecular molecules mosaic disease mRNA mutation natural normal nucleic acid Once organisms origin pathogens phage plant plant viruses plasmids population previously prions produced prophage protein range receptor replicate retrovirus RNA genome Scientists similar simplest single specific spread stranded structure surface symptoms synthesis tail template tobacco mosaic transmission usually viral diseases viral DNA viral genome viral infection viral proteins viroids virulent phage virus viruses and bacteria