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: 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.

SOLUTION: Science

PROBLEM: One character in this work tells a story about being courted by Edgar Atkins Teagarden from Jasper, Georgia, and every Saturday, he would bring her a watermelon with his initials carved into it, while dining at "The Tower," which is run by Red Sammy Butts, who declares the title phrase. A story about a house with a secret panel leads to an incident where Pitty Sing leaps out of her basket and lands on Bailey's shoulder. Hiram and Bobby Lee take the children John Wesley and June Starr into the woods despite the pleas of the grandmother, in, for 10 points, this short story about a family that is murdered by the Misfit, written by Flannery O'Connor.

SOLUTION: Literature

PROBLEM: His early theory of evolution led to Galen labeling him the founder of Italian medicine. A native of Acragas, he had been expelled from the Pythagorean order for "stealing discourses. " Of his original written works the poem Katharmoi is one of only two extant. In his philosophy he proposed cycles of Love and Strife that would join and separate the natural makeup of the world. FTP, name this Greek philosopher, who might have thrown himself into Mt. Etna and believed that matter was made up of fire, water, earth, and air.

SOLUTION:
History