Cell Membrane Structure and Function
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Questions and Answers

Which of the following is NOT a component of cell membrane structure?

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

What is the primary function of the cell membrane?

  • To provide structural support to the cell
  • To separate the cytoplasm from its extracellular environment (correct)
  • To regulate cell growth
  • To facilitate cellular movement

What is the primary function of cholesterol in cell membranes?

  • To increase the fluidity of membrane components
  • To facilitate the transport of materials across the membrane
  • To restrict the movement of phospholipid fatty acids, modulating membrane fluidity (correct)
  • To provide energy to the cell

What is the term used to describe membrane lipids that contain both hydrophobic and hydrophilic regions?

<p>Amphipathic (A)</p> Signup and view all the answers

Which of the following lipids is prominent in myelin sheaths?

<p>Sphingomyelin (A)</p> Signup and view all the answers

What is the process by which the cell membrane exchanges material with the extracellular fluids?

<p>Endocytosis and exocytosis (B)</p> Signup and view all the answers

What is the main classification of membrane proteins?

<p>Peripheral and integral proteins (D)</p> Signup and view all the answers

What is the process by which the cell uptakes large particles or fluid from the extracellular medium to the inside the cell?

<p>Endocytosis (A)</p> Signup and view all the answers

Which type of endocytosis involves the ingestion of large particles such as viruses, bacteria, cells, or debris?

<p>Phagocytosis (A)</p> Signup and view all the answers

What is the term for the release of macromolecules to the exterior of the cell?

<p>Exocytosis (D)</p> Signup and view all the answers

What is an example of a molecule that is internalized by coated pits containing its specific receptor?

<p>Low-density lipoprotein (LDL) (D)</p> Signup and view all the answers

What is the transport of small molecules across the membrane classified into?

<p>Passive and active transport (D)</p> Signup and view all the answers

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