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]: In solid-state physics, a dimensionally-equivalent "sheet" version of this quantity is often reported as its value "per square". Its quantum is equal to h over e squared, and the Drude model gives this extensive quantity as inversely proportional to the product of carrier number density and mobility. A complex version of this quantity includes a term equal to frequency times inductance. The power dissipated in a circuit equals (*) current squared times this value. Voltmeters work by applying a very large value for this quantity in parallel. Devices that provide this quantity are marked with a series of colored bands and symbolized with a zig-zag line. For 10 points, name this quantity set equal to voltage over current in a law named for Ohm, who also names its SI unit.
[EX A]: Science

[EX Q]: In the beginning of this book, three Jewish servants refuse to eat the food of the king, but nonetheless grow healthier on a diet of vegetables and water. In one part of this book sometimes omitted, two men disagree about the type of tree under which they claim a woman met her lover, leading to their deaths. In a different part of this book which is sometimes omitted, a giant creature is secretly fed through a trapdoor, which is revealed by the namesake of this book. In this book, Shadrach, Mashach, and Abed-Nego are thrown in a furnace. Later, the writing "Mene, Mene, Tekel, Ufarsin" appears on the wall at Belshazzar's Feast. The apocryphal sections of "Susanna and the Elders" and "Bel and the Dragon" sometimes appears in this book of the Bible. For 10 points, name this book named for a prophet whom King Darius throws into a den of lions.
[EX A]:
Social Science