Practice Quiz

CLEP Natural Sciences - Biological Science - Question List

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71. Salivary amylase breaks down which class of organic molecules?
  1. carbohydrates
  2. lipids
  3. nucleic acids
  4. proteins
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72. Which of the following statements best describes an effect of pH on the functioning of salivary amylase?
  1. Salivary amylase functions most effectively at a pH of about 4.
  2. Salivary amylase functions most effectively at a pH of about 7.
  3. Salivary amylase cannot break down starch into maltose at pH values less than 7.
  4. Salivary amylase breaks down proteininstead of starch at pH values greater than 9.
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73. Fatty acids are one of the products that result from the action of lipase in the digestive system. What is one way that fatty acids are used in the body?
  1. for storing energy
  2. for encoding genetic information
  3. as the building blocks of antibodies
  4. as the building blocks of hemoglobin
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74. Female cattle that have white coats are crossed with male cattle that have red coats. Both male and female offspring have roan coats, which are coats with both red hairs and white hairs. Which of the following best describes the genetics of coat color in the cattle?
  1. The red and white alleles aresex-linked.
  2. The red and white alleles are codominant.
  3. The red allele is recessive to the white allele.
  4. The red allele is dominant to the white allele.
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75. An endangered species is most vulnerable to extinction when it has which of the following characteristics?
  1. a high birthrate
  2. a large variety in its diet
  3. a small amount of competition
  4. a small amount of genetic diversity
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