Cell Membrane Structure Quiz
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Questions and Answers

What is the main function of proteins in the cell membrane?

  • Maintain the cell's chemical climate and assist in molecule transfer (correct)
  • Form a lipid bilayer
  • Assist in forming amphipathic molecules
  • Give membranes flexibility
  • Which component forms a lipid bilayer in the cell membrane?

  • Cholesterol
  • Lipids
  • Proteins
  • Phospholipids (correct)
  • What is the main role of cholesterol in animal cell membranes?

  • Monitor and maintain the cell's chemical climate
  • Assist in molecule transfer
  • Provide structural support and regulate fluidity (correct)
  • Form a lipid bilayer
  • Why are phospholipids considered amphipathic molecules?

    <p>They have both hydrophilic and hydrophobic parts</p> Signup and view all the answers

    Which component helps to give membranes their flexibility?

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

    What makes the lipid bilayer semi-permeable?

    <p>Amphipathic nature of phospholipids</p> Signup and view all the answers

    What is the function of glycoproteins in the cell membrane?

    <p>Assisting in cell recognition and acting as receptors and antigens</p> Signup and view all the answers

    Which statement best describes the composition of the cell membrane?

    <p>Composed of two layers of phospholipids and embedded with proteins</p> Signup and view all the answers

    What is the primary function of the cell membrane?

    <p>Regulating the entry and exit of substances into the cell</p> Signup and view all the answers

    In what type of cells are glycoproteins found?

    <p>In both prokaryotic and eukaryotic cells</p> Signup and view all the answers

    What role do receptor proteins play in cell function?

    <p>Facilitating communication with the external environment through signaling molecules</p> Signup and view all the answers

    What is meant by the term 'semi-permeable' when describing the cell membrane?

    <p>It allows only selected substances to diffuse across the membrane</p> Signup and view all the answers

    Which component of the plasma membrane is important for cell recognition and acts as receptors and antigens?

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

    What is the main role of glycolipids in the plasma membrane?

    <p>Assisting in cell recognition and acting as receptors and antigens</p> Signup and view all the answers

    What type of molecules make up the majority of the cell membrane's composition?

    <p>Carbohydrates bonded to lipids and proteins</p> Signup and view all the answers

    What is a characteristic feature of phospholipids in a cell membrane?

    <p>They contain both hydrophilic heads and hydrophobic tails</p> Signup and view all the answers

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