Q: Answer the following question given this paragraph: Following the discovery of the electron, J. J. Thomson developed what became known as the " plum pudding " model in 1904. Plum pudding is an English dessert similar to a blueberry muffin. In Thomson's plum pudding model of the atom, the electrons were embedded in a uniform sphere of positive charge like blueberries stuck into a muffin. The positive matter was thought to be jelly- like or a thick soup. The electrons were somewhat mobile. As they got closer to the outer portion of the atom, the positive charge in the region was greater than the neighboring negative charges and the electron would be pulled back more toward the center region of the atom. Q: Thomson's plum pudding model shows the structure of what? Choices: - nucleus - cell - DNA - atom A:
A: atom

Q: Answer the following question given this paragraph: The canoe paddles, nutcracker, and hammer that you read about in this lesson have something in common. All three are examples of a type of simple machine called a lever. Q: Canoe paddles, nutcracker, and hammer are examples of what type of simple machine? Choices: - lock - handle - pivot - lever A:
A: lever

Q: Answer the following question given this paragraph: The release of calcium ions initiates muscle contractions. Watch this video (http://openstaxcollege. org/l/calciumrole) to learn more about the role of calcium. (a) What are "T-tubules" and what is their role? (b) Please describe how actinbinding sites are made available for cross-bridging with myosin heads during contraction. Q: The release of calcium ions initiates what? Choices: - exhalation - cramps - spasms - muscle contractions A:
A: muscle contractions

Q: Answer the following question given this paragraph: The Fate of the Carbon Skeleton Any amino acid can be converted into an intermediate of the citric acid cycle. Once the amino group is removed, usually by transamination, the -keto acid that remains is catabolized by a pathway unique to that acid and consisting of one or more reactions. For example, phenylalanine undergoes a series of six reactions before it splits into. Q: Which process helps deaminate amino acids? Choices: - deactivation - bromination - caramelization - transamination A:
A: transamination