"Viruses" . "1898 in biology" . . "Hindustani musical instruments" . "Polymerase chain reaction" . "Molecular biology" . "American inventions" . "Virus genera" . "Biotechnology" . "Hoffmann-La Roche" . "Virology" . "Amplifiers" . . "DNA profiling techniques" . "Molecular biology techniques" . "Laboratory techniques" .