TASK DEFINITION: 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.
PROBLEM: The Hoecht stain binds to the minor groove of this molecule, forming G-quadruplexes. The ratio of nitrogen isotopes in this molecule, which exists in A, B, and Z forms, was measured in the Meselson-Stahl experiment to give evidence for its semiconservative replication. It winds around proteins called histones, and Okazaki fragments are formed when its namesake enzyme travels from the 5-prime to 3-prime direction of this molecule adding nucleotides. For 10 points, name this molecule that carries the genetic information of living organisms.

SOLUTION: Science

PROBLEM: This element's only oxidation state is -1, and it is impossible to free from its compounds by chemical means. It is prepared commercially be the same method which Henri Moisson used to isolate it in 1886, and is also found in the mineral cryolite. Its only isotope is the stabe 19 version, and in its gaseous form takes on a pale yellow color. The most electronegative and reactive of the elements, FTP, what is this lightest of the halogens with atomic number 9 and symbol F

SOLUTION: Science

PROBLEM: He describes flicking his sword and singing Taking the Hard Road in Ancient Air, and claimed My thoughts of you are like the Wens waters in a poem written to his greatest rival. Another of his poems describes himself, his shadow, and the moon surrounding a pot of wine, though Americans may known him best from a work where the addressee has gone to the land of the swirling eddies and has abandoned his child-bride, and from Mahlers use of a compilation of his work, The Chinese Flute, in Das Lied von der Erde. Notably translated into English by Ezra Pound, FTP, name this Tang poet of The River Merchants Wife, best known for not being Du Fu.

SOLUTION:
Literature