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.

[EX Q]: Earthworms uniquely use the molecule lombricine to react with this molecule. This molecule activates P2X3 and P2X2/3, two receptors that control pain responses, and in conjunction with luciferin this molecule is responsible for the light of fireflies. In the muscular tissue of chordates, this compound donates a group to creatine. In proteins, this molecule, first synthesized by Alexander Todd, is almost always bound by a magnesium cofactor, and large quantities of this molecule are produced via oxidative phosphorylation in the electron transport chain. For 10 points, name this molecule discovered by Karl Lohmann,, the energy currency of the cell.
[EX A]: Science

[EX Q]: One author from this country wrote about a nave village boy recruited to fight in a civil war in his "novel in rotten English," Sozaboy. Another author from this country was awarded the 1991 Booker Prize for his best known work, The Famished Road. Another novel by an author from this nation is No Longer at Ease, which recounts the firing of a government worker, Obi Okonkwo, whose similarly named grandfather was the protagonist of the novel Things Fall Apart. For 10 points, name this nation of Ken Saro-Wiwa, Ben Okri and Chinua Achebe.
[EX A]: Literature

[EX Q]: A brown-and-white dog stands at the bank of a small river in the foreground of this work, while a white-walled building with a peaked roof and a brick chimney sits on the left in front of copse which ends near the centerline of the canvas. The trees are now gone, but the building, owned by Willy Lott, survives almost unaltered to this day. It did not attract attention until displayed in France, where it was praised by Gericault. Depicting a scene in the River Stour in Suffolk, two black horses wading in the river pull the title object, which carries two men. FTP, name this 1821 painting by John Constable, which shares its name with a triptych by Hieronymous Bosch.
[EX A]:
Fine Arts