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.
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Question: A ubiquitin ligase that marks specific proteins which the 26S proteasome breaks down is known as its (*) promoting complex, and in plants, the step immediately following it features vesicles moving along the phragmoplast. The step preceding it is ended by inactivation of cyclin dependent kinases, and the kinetochore fibers become shorter during this step. Chromatid pairs separate into identical chromosomes, which are subsequently pulled to the poles by the spindle fibers. FTP, identify this step of cell division that follows metaphase.

Answer: Science

Question: One reaction to prepare these compounds adds diazomethylphosphonate esters to aldehydes under basic catalysis and generates vinyl-diazo intermediates. Along with aldehydes, these compounds are the degradation products of alpha, beta-epoxy tosylhydrazones in the Eschenmoser fragmentation. A coupling involving both palladium and copper catalysis, in which these compounds react with aryl halides, is the Sonogashira reaction. These compounds react with azides to form triazole rings in a well-known click-chemistry reaction, and terminal ones can be deprotonated by sodium amide. They are reduced to cis-alkenes by the poisoned Lindlar catalyst. This functional group is composed of two sp-hybridized carbons. For 10 points, name this functional group consisting of a carbon-carbon triple bond.

Answer: Science

Question: Gower and Portland are embryonic types of this molecule and the Bart form results in its namesake H disease, which is a type of thalassemia. The change between its tense and relaxed structure results from a 15 degree rotation between its two alpha-beta dimers. Its ability to neutralize hydrogen ions is described by the Haldane effect, while the impact of pH on it is described by the Bohr effect. Impacted by 2,3-DPG, a variant of this protein has a valine substituted for a glutamic acid. For 10 points, name this iron-containing component of red blood cells that carry oxygen.

Answer:
Science