Practice Quiz

MCAT Biology - Question List

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236. The atomic number of an element indicates which of the following?
  1. the number of neutrons in the atom
  2. the number of protons in the atom
  3. the sum of the neutrons and protons in the atom
  4. the sum of the protons and electrons in the atom
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237. Which of the following is not true of a sample of gas as it is heated in a rigid, closed container?
  1. The pressure of the molecules increases.
  2. The average speed of the molecules increases.
  3. The average distance between molecules increases.
  4. The number of collisions between molecules increases.
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238. The density of a gas is 1.35 g/L at standard temperature and pressure (STP). What is the molar mass of the gas at STP?
  1. 0.0603 g/mol
  2. 6.02 g/mol
  3. 22.4 g/mol
  4. 30.2 g/mol
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239. The three main types of nuclear radiation are alpha, beta, and gamma. Which of the following lists these types of radiation from highest penetrating power to lowest penetrating power?
  1. alpha, gamma, beta
  2. beta, alpha, gamma
  3. beta, gamma, alpha
  4. gamma, beta, alpha
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240. Water cools from 2°C to -2°C. During this time, what happens to the motion of the molecules?
  1. The motion of the molecules stops.
  2. The motion of the molecules increases.
  3. The motion of the molecules decreases.
  4. The motion of the molecules remains the same.
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