Unit 1 multiple choice quiz

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1. Which of the following statements is true about a phospholipid?

  • it has a hydrophilic tail of three fatty acids
  • it has a hydrophobic tail of two fatty acids
  • it has a hydrophobic tail of three fatty acids
  • it has a hydrophilic tail of two fatty acids
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2. Analysis of a sample of DNA found that 40% of the nucleotides contained cytosine. In the same sample of DNA the percentage of nucleotides containing adenine would be

  • 10
  • 60
  • 20
  • 40

3. Which type of sugar is found in a nucleotide?

  • heptose
  • pentose
  • hexose
  • triose

4. A catalyst

  • increases the rate of reaction by increasing the activation energy
  • decreases the rate of reaction by increasing the activation energy
  • increases the rate of reaction by reducing the activation energy
  • decreases the rate of reaction by reducing the activation energy

5. An anticoagulant...

  • decreases the time taken for a blood clot to form
  • increases blood cholesterol concentrations
  • increases the time taken for a blood clot to form
  • decreases blood cholesterol concentrations
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