BIOL1- AQA A-Level Biology Unit 1

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1. What are the roles of lipids?

  • Protection, Insulation, Waterproofing, Energy source, Plasma Membrane flexibility
  • Protection, Insulation, Diffusion pathway, Energy source, Plasma Membrane flexibility
  • Protection, Kill bacteria, Waterproofing, Energy source, Plasma Membrane flexibility
  • Protection, Insulation, Waterproofing, Maintaing a concentration gradient, Plasma Membrane flexibility
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2. What do antibodies consist of?

  • 4 heavy polypeptide chains
  • 3 heavy polypeptide chains and 1 short polypeptide chain
  • 2 heavy polypeptide chains and 2 short polypeptide chains
  • 1 heavy polypeptide chain and 3 short polypeptide chains

3. Which of these groups doesn't have reduced immunity?

  • Those undergoing treatment with imunosuppressive drugs
  • The malnourished
  • People taking steroids
  • People with AIDS

4. What is the gas exchange surface in the lungs?

  • Alveolar membrane
  • Bronchioles
  • Capillaries
  • Alveolar epithelium

5. Where are the micro-villi located?

  • The epithelial cells lining the villi
  • The epithelial cells lining the intestine
  • The endothelium of the villi
  • The capillaries of the villi

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