Plasma Membrane and Transport Mechanisms
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Questions and Answers

Which of the following is true about the plasma membrane?

  • It allows all substances to cross it easily
  • It is made up mostly of carbohydrates
  • It does not exhibit selective permeability
  • It separates a living cell from its surroundings (correct)

    • What is the main component of cell membranes?

  • Carbohydrates
  • Nucleic acids
  • Proteins
  • Phospholipids (correct)

    • What is the function of the plasma membrane?

  • To prevent the entry of water molecules
  • To eliminate all inbound traffic
  • To allow all substances to cross it easily
  • To control all chemical exchanges (correct)

    • What is the term used to describe the property of the plasma membrane that allows it to selectively allow certain substances to cross?

    <p>Selectivity</p> Signup and view all the answers

    What interacts with water molecules in a phospholipid?

    <p>Polar head</p> Signup and view all the answers

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