Round 10: Tossup 15

Cholera toxin ADP ribosylates a protein’s G-s-alpha subunit, thereby preventing this reaction from occurring. (-5[1])The mechanism of most glycosidases occurs through this type of reaction. Performing this reaction (-5[1])on amides results in carboxylic acids. In muscle contraction, this type of reaction re-positions the myosin head, readying it to bind to (*) actin. Once a protein is tagged by ubiquitin, it is subjected to this type of reaction. (-5[2])This reaction, which releases ADP and an inorganic phosphate when it is done (-5[1])on (10[1])ATP, is the opposite of dehydration synthesis. (10[1])For 10 (10[1])points, name this reaction that uses water to break down macromolecules. ■END■ (10[4]0[2])

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