instruction:
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.
question:
One protein that binds to this protein also binds to proline-rich sequences in the membrane proteins Vasp and Mena, and another is knocked out in the singed mutant. Phosphatidyl-inositol-4,5-bisphosphate regulates the binding of vinculin to both talin and this other protein, whose function is performed by nematode Major Sperm Protein in the only (*) eukaryotic cells known to lack one form of it. In addition to the aforementioned profilin and facsin, severin and gelsolin bind to this protein and sever it. Two toxins often used to study it are cytochalasins and phalloidin. Thymosin 4 sequesters this protein, which undergoes treadmilling because the critical concentration at its (+) and (-) ends is not the same. This protein consists of G monomers which polymerize into F filaments, which make up the microfilaments of the cytoskeleton. For 10 points, name this protein that forms cross-bridges with myosin in muscle cells.
answer:
Science


question:
revolt in this city was caused by the working class Cabochiens. Abbo Cernuus provides the only account of the siege of this city in 885, which saw the appearance of Rollo, who later became Robert I of Normandy, command the besieging forces. This Western European city contains a building built to house the Crown of Thorns bought from the Byzantines. In addition to La Sainte-Chapelle, this city saw the Day of the Barricades, forcing Henry III out of this (*) Catholic city. It was extensively renovated under Baron Haussmann. and besieged during the Franco-Prussian War. For 10 points, name this city, the home of the Louvre and capital of France.
answer:
History


question:
The volcano Bar is this countrys tallest peak, while an active volcano called Iraz erupted during JFKs visit here in 1963. Gulfs that indent its coast include Chiriqu and Mosquito, and its major cities include Bocas del Toro and Yaviza. The manmade Gatun Lake forms a large portion of this countrys most distinctive feature, which is flanked by the cities of Cristobal, Coco Solo, and Balboa in addition to its namesake capital city. For 10 points, name this country bordered by Costa Rica and Colombia, with a namesake canal that connects the Atlantic and Pacific.
answer:

Social Science