In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

An RNA polymerase from one of these organisms is commonly used in in vitro transcription experiments, and one well-studied example of these organisms uses the Q antiterminator to transcribe its structural components. Benzer's rII system uses these organisms for single-nucleotide mutation mapping, and the Phi-X-174 example of these organisms was the first to have its genome (*) sequenced. These organisms carry genetic information between cells in transduction. These organisms were labeled with 32P and 35S in the experiment that showed that DNA is the substance that stores genetic information, performed by Hersey and Chase. These organisms use their tail proteins as an injection mechanism. For 10 points, name these viruses that infect bacteria.
Science

This country's early railways include the spiral tunnels of the Gotthard line, and its Glacier Express railroad has a terminus at St. Moritz. This home of the vineyard terraces at Lavaux ("luh-VOE") is home to a castle where Lord Byron's poem "The Prisoner of Chillon" is set. This country hosts the yearly World Economic Forum at Davos. This country includes about eighty thousand speakers of Romansh, its fourth official language. For 10 points, name this landlocked European country home to Lake Lucerne, whose Alps include the north face of the Matterhorn.
History

These entities can have an anti-terminator, such as LicT protein for sacPA, which stabilizes a secondary RNA structure. Early termination of their processes, which can occur via an alternate loop structure with excess of a particular amino acid, is known as attenuation. They can be inducible, as by IPTG for a well known example, and they can contain two kinds of repressors: a translational one, and a better understood transcriptional one, which binds to the operator site. All of them must have these operator sites, as well as promoter sites where RNA Polymerase originally binds. FTP, name these prokaryotic strips of DNA that regulate expression of related genes, which include the trp [trip] and lac varieties.

Science