Practice Quiz

CLEP Natural Sciences - Biological Science - Question List

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36. A researcher is studying a particular disease-causing agent. The agent has a protein coat, but it lacks a nucleus, contains no other organelles, and can reproduce only when it is inside an animal cell. The researcher should classify the agent as which of the following?
  1. a bacterium
  2. a fungus
  3. a protist
  4. a virus
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37. A pedigree is a diagram that traces the inheritance of a trait through a family. Which of the following patterns is typical in a pedigree for an autosomal dominant trait?
  1. The trait affects only males.
  2. The trait appears in every generation.
  3. The trait appears in only one-fourth of the individuals.
  4. The trait affects all the individuals of the second generation.
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38. Which of the following statements best describes why the change in only one DNA base of the hemoglobin gene results in a different protein product of the gene?
  1. The change prevents mRNA from being made.
  2. The change alters the amino acid sequence of the protein.
  3. The change causes the blood cells to divide in an uncontrolled way.
  4. The change creates a second strand of mRNA for each RNA molecule.
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39.

Which of the following cell structures carries out the process of translation?

  1. mitochondrion
  2. nucleus
  3. ribosome
  4. vacuole
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40. Which of the following statements best summarizes a change that is represented by the arrows labeled “3” in the diagrams?
  1. A nucleus is formed in each cell.
  2. Each cell divides to form two daughter cells.
  3. A chain of amino acids is folded to form a protein in each cell.
  4. Proteins are transported through the plasma membrane of each cell.
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