Practice Quiz

PreACT Exam Prep - Question List

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6. In translation, the first codon always codes for what amino acid?
  1. Alanine
  2. Valine
  3. Proline
  4. Tryptophan
  5. Methionine
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7.

The power of a toaster can be determined if which of the following values are known?

  1. the resistance of the toaster’s insulation
  2. the voltage applied to the toaster and the toaster’s temperature
  3. the current through the circuit and the voltage applied to the toaster
  4. none of the above
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8. A boat tied to a dock is stationary. Water waves constantly pass by the boat. The crests of the waves are 3 m apart and a crest passes the front of the boat every 4 s.

What is the velocity of the waves?
  1. 0.75 m/s
  2. 1.33 m/s
  3. 3 m/s
  4. 12 m/s
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9. The half-life of 32 grams of a radioactive substance is 6.5 hours. How many grams of the substance remain after 19.5 hours?
  1. 16 grams
  2. 8 grams
  3. 4 grams
  4. 2 grams
  5. 32 grams
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10. What term classifies a phase change from a solid directly to a gas?
  1. Vaporization
  2. Deposition
  3. Effervesence
  4. Fusion
  5. Sublimation
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