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.

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.
Science

This man put forth a theory on the formation of sentences intended to refute Hermann Pauls theory, using the example that, in the sentence Grass is green, our representation of grass contains our representation of green. He was given a typewriter as a gift by his student James Mckeen Cattell; he posited that the mind constructs psychic resultants which are formed by associations or apperceptive combinations. His first publication was Contributions to the Theory of Sense Perception, after which he formulated his theory of introspection, and then wrote Lectures on the Mind of Humans Animals. Another important idea of his is the tridimensional theory of feeling, discovered while employing physiological techniques in his famous laboratory. FTP, name this German-born Father of Experimental Psychology.
Social Science

This painter's indulgence of visual fantasy, and appreciation of different historic architectural styles can be seen in his 1840 Architect's Dream. After a series of paintings on The Last of the Mohicans, he made a three year trip to Europe in 1829, but he is better known for a trip four years earlier in which he journeyed up the Hudson River to the Catskill Mountains. FTP, name this painter of The Oxbow and The Voyage of Life series.
Fine Arts