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.

[Q]: A namesake protein component of this structure is detected by Toll-like Receptor 5. Tg737, whose mutation causes polycystic kidney disease in mice, is responsible for transport within this structure, which is also dependent upon complexes of IFT proteins. Y. Pestis uses a structure homologous to these to inject virulence factors into host cytoplasm, known as the Type III secretory system. They have a P, L, and MS ring in gram-negative bacteria, and in all organisms their central body is called the axonene. In Eukaryotes, they contain a 9+2 set of microtubules around a central pair and use dyenin and ATP hydrolysis to power their whipping motion. Similar to cilia, for 10 points, name these projections used by cells to swim.
[A]: Science


[Q]: Lin and Shu proposed the density-wave theory to explain how the structure of these entities is sustained. The most accurate method for measuring the distances to distant ones uses a relation between their maximum rotational velocity and absolute magnitude, which is known as the Tully-Fisher method. They are generally blue because of their high content of old stars, and one type of them features arms that emanate from each end of a namesake structure. They have discs like the lenticular type, but contain much more angular momentum than the elliptical type. FTP name these galaxies, some of which are barred, including the Milky Way.
[A]: Science


[Q]: leader sponsored a trip by Gilberto Freyre that led to the publication of Adventures and Routine. This man ordered the construction of Cristo Rei, and he served alongside Presidents Antonio Carmona and Americo Thomaz. His secret police force was named the (*) PIDE, and he fought against Nehru in Operation Vijay for control of Goa. This man also fought wars in Angola and Mozambique, and his unpopular foreign policies would lead to his successor, Marcelo Caetano, being overthrown in the Carnation Revolution. For 10 points, name this Prime Minister from 1932 to 1968 who presided over the Estado Novo in Portugal.
[A]:
History