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: One reactant for this reaction is best prepared by an S N 2 nucleophilic addition of a triphenyl compound, followed by elimination of the hydrogen halide by an organolithium reagent. This reaction itself proceeds through a rather unique intermediate formed when the pi electron from the reagents carbon-oxygen double bond migrates to the positively charged pole of one reactant; this intermediate is called a an oxaphosphetane, from which a triphenyl oxide is eliminated to complete the reaction. The aforementioned positively charged pole is on phosphorous because the aforementioned prepared reactant is a phosphorous ylide. For ten points, name this reaction that produces selectively double-bonded alkenes from aldehydes and phosphorous ylides and that is named for the German 1979 Chemistry Nobel winner.

A: Science
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Q: The relationship between temperature and this quantity is given by the Steinhart-Hart equation. Tunnel diodes have a negative value for this quantity, whose changes are measured by the most common type of strain gauge. The proximity and skin effects cause increases in this quantity with increasing frequency. The time constant tau is equal to indudctance divided by this quantity in an RL circuit. An unknown value of this quantity can be determined with a Wheatstone bridge. This quantity is the real part of impedance in AC circuits, and it is equal to voltage divided by current. For 10 points, name this opposition to the flow of current that is measured in ohms.

A: Science
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Q: Heptamegaly usually results from Cori's disease and Andersen's disease, both of which occur due to dysfunctional enzymes involved in the synthesis of this compound. One enzyme involved with the breakdown of this compound uses pyridoxal phosphate at catalytic sites and only acts on the alpha 1-4 bonds; a branching enzyme is required to eliminate alpha (*) 1-6 linkages and create a linear polymer. During its synthesis, the action of uridyl transferase forms a pyrophosphate intermediate in addition to UDP-glucose. In hepatocytes, a high level of insulin prevents the breakdown of this compound, a degradation promoted by glucagon. For 10 points, name this animal analogue of starch.

A:
Science
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