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.

[Q]: Imetelstat, a potential new cancer therapy agent, works by targeting the enzyme that repairs these   structures. Blackburn, Greider, and Szostak received the 2009 Nobel Prize for determining the role of  these structures, which typically adopt a G-quadruplex shape. The shortening of these structures   explains the Hayflick limit to cell division and is the basis for the cellular theory of aging, and that  shortening of these structures can lead to cell senescence or apoptosis. Consisting of thousands of  TTAGGG repeats in humans, name these end sequences of chromosomes that prevent genes from  being lost during DNA replication.
[A]: Science


[Q]: His opus 113 is a collection of four pieces for viola and piano entitled Mrchenbilder. More famous is a song cycle in which the singer's final word falls on a half-diminished ii6/5 [two six five] chord, giving way to an extended piano postlude in the parallel major of the main key of the final song, "Die alten, bsen Lieder. " "Ich grolle nicht" is another movement of that cycle, Dichterliebe. This composer also wrote a piano piece whose first movement alludes to Beethoven's An die ferne Geliebte and a collection whose most famous piece is "Trumerei. " FTP, identify this composer who, in addition to Fantasy in C and Scenes from Childhood, wrote the "Rhenish" and "Spring" symphonies.
[A]: Fine Arts


[Q]: Phenothiazines such as chlorpromazine work by blocking receptors for this molecule, which is transported to its primary location in the tuberoinfundibular pathway. Monoamine oxidase and catechol-o-methyl transferase break down this chemical, a process enhanced by the drug reserpine. A catecholamine produced in the substantia nigra and released from the hypothalamus, this compound inhibits the release of prolactin in the pituitary gland, among other functions. Derived from tyrosine and a precursor to adrenaline, disorders that result from a deficiency in this molecule include ADHD and Parkinson's disease. For 10 points, name this inhibitory neurotransmitter implicated in arousal and addiction and supposedly central to pleasure and reward.
[A]:
Science