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 protein that binds to this protein also binds to proline-rich sequences in the membrane proteins Vasp and Mena, and another is knocked out in the singed mutant. Phosphatidyl-inositol-4,5-bisphosphate regulates the binding of vinculin to both talin and this other protein, whose function is performed by nematode Major Sperm Protein in the only (*) eukaryotic cells known to lack one form of it. In addition to the aforementioned profilin and facsin, severin and gelsolin bind to this protein and sever it. Two toxins often used to study it are cytochalasins and phalloidin. Thymosin 4 sequesters this protein, which undergoes treadmilling because the critical concentration at its (+) and (-) ends is not the same. This protein consists of G monomers which polymerize into F filaments, which make up the microfilaments of the cytoskeleton. For 10 points, name this protein that forms cross-bridges with myosin in muscle cells.

A: Science
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Q: This author wrote about Octave de Malivert's love with the title character in Armance, and also published a story collection called the Italian Chronicles. This man also wrote about a resident of Lake Como who attempts to join Napoleon's army before that man, Fabrizio del Dongo, ultimately retires to the titular residence. In addition to The (*) Charterhouse of Parma, this man wrote a novel whose protagonist is sentenced to death after shooting at Madame de Renal. For 10 points, name this French author who created Julien Sorel in The Red and the Black.

A: Literature
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Q: Induction coils with spark gaps were the first devices to suggest its existence. When the receiving coil in an 1887 experiment was enclosed in a dark case, the observed spark was always smaller. The aforementioned work by Hertz was followed by contributions in the area from Thomson and Lenard. Lenard found that it was independent of the ultraviolet lights intensity, but it took until the article On a Heuristic Point of View about the Creation and Conversion of Light for the concept to be widely diffused. For 10 points, the work function is associated with this effect, whose discovery won the 1905 Nobel Prize for Physics for Albert Einstein.

A:
Science
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