Ques:Answer the following question given this paragraph: An amide bond joining two amino acid units is called a peptide bond. Note that the product molecule still has a reactive amino group on the left and a reactive carboxyl. Q: An amide bond joining two amino acid units is called a what? Choices: - carboxyl bond - ammonia bond - precipitate bond - peptide bond A:

Ans:peptide bond
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Ques:Answer the following question given this paragraph: A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the displacement. For example, a marble at the bottom of a bowl will experience a restoring force when displaced from its equilibrium position. This force moves it back toward the equilibrium position. Most systems are in stable equilibrium, especially for small displacements. For another example of stable equilibrium, see the pencil in Figure 9.11. Q: A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the what? Choices: - velocity - variation - dispersement - displacement A:

Ans:displacement
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Ques:Answer the following question given this paragraph: Light from objects at different distances is focused by the lens of the eye. Muscles in the eye control the shape of the lens so the light is focused on the back of the eye no matter how far the object is from the lens. Q: Light from objects at different distances is focused by what part of the eye? Choices: - iris - pupil - meniscus - lens A:

Ans:lens
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Ques:Answer the following question given this paragraph: Concentration is the number of particles of a substance in a given volume. When the concentration of reactants is higher, the reaction rate is faster. At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react. Did you ever see a sign like the one in Figure below ? You might see it where someone is using a tank of pure oxygen for a breathing problem. The greater concentration of oxygen in the air makes combustion rapid if a fire starts burning. Q: The number of particles of a substance in a given volume is known as? Choices: - frequency - range - mass - concentration A:

Ans:
concentration
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