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.
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Question: Coombs tests detect these bodies bound to erythrocytes, and a technique that uses these entities is ELISA. These molecules have a namesake fold, in which two beta sheets are held together by amino acid charges. These adaptable molecules can somatically recombine in a process called V(D)J recombination and are also capable of changing isotype by altering conformation of their heavy chains. Like enzymes, they operate via a a so-called "lock-and-key" mechanism, as verified by Linus Pauling. FTP, name these characteristically y-shaped immune molecules exploited in vaccination and produced by B cells in response to specific antigens.

Answer: Science


Question: sum of the squares of the reciprocals of this function evaluated at the nonnegative integers is equal to the modified Bessel function of the first kind at x=2. The Leviathan Number is found by evaluating this function at 10 to the 666th power. The rising type can be represented with the Pochhammer Symbol. Wilson's Theorem states that this function of any prime minus 1 is also congruent to -1 modulo that prime. Legendre's theorem provides a corollary to determine the number of (*) trailing zeroes of this function evaluated at nonnegative integers. When this function is evaluated at large numbers, Stirling's approximation is used. The gamma function extends this function to all complex numbers other than negative integers. For 10 points, name this function that, for positive integers n, is the product from 1 to n, and which is represented by an exclamation point.

Answer: Science


Question: The most important source for this man's life is Priscus, and the Battle of Nedao saw one his sons killed by Ardaric, who had earlier allied with this ruler as leader of the Gepids. His other allies included Valamir, leader of the Ostrogoths, and he planned to attack the Visigothic kingdom of Tolouse with Valentinian III. He succeeded his uncle Rua with his co-ruler and brother Bleda, and trouble started when Honoria sent this man an engagement ring and he demanded half the Western Roman Empire as a dowry. He was defeated by Theodoric I and Flavius Aetius at the Battle of Chalons. For 10 points, name this "Scourge of God," the most famous leader of the Huns.

Answer:
History