Understanding Polymers and Membranes
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Questions and Answers

What are biological polymers typically formed by?

  • Addition polymerization
  • Hydrolysis
  • Dehydration (correct)
  • Oxidation
  • Which of the following is a common biological polymer mentioned in the text?

  • Proteins (correct)
  • Aluminum
  • Silicon
  • Gold
  • What type of group is found at the hydrophilic head of membranes?

  • Phosphate (correct)
  • Alkane
  • Hydrophobic
  • Carboxylic acid
  • Why do simple detergents retain amphipathicity?

    <p>Fatty acids</p> Signup and view all the answers

    What function do cellular membranes serve as per the text?

    <p>Compartmentalization and protection</p> Signup and view all the answers

    The immiscibility of what substances gives rise to compartmentalization, protection, and energy generation in cells?

    <p>Water and lipids</p> Signup and view all the answers

    What is the main factor that affects the speed of diffusion?

    <p>The distance separated by the spaces</p> Signup and view all the answers

    Why do biological membranes pose a barrier to diffusion?

    <p>To maintain an imbalance in ion concentrations</p> Signup and view all the answers

    What does the Nernst Equation describe?

    <p>The equilibrium between chemical and electrical forces on charged molecules</p> Signup and view all the answers

    What causes a membrane voltage to occur?

    <p>Balanced immobile charges and charge transport</p> Signup and view all the answers

    How can the voltage across cell membranes be measured?

    <p>With microelectrodes implanted in cells</p> Signup and view all the answers

    What drives the diffusion of ions (charges) across biological membranes?

    <p>Both chemical and electrical gradients</p> Signup and view all the answers

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