Cellular Processes Quiz
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Questions and Answers

What type of transport allows the free passage of specific polar molecules?

  • Secondary active transport
  • Primary active transport
  • Facilitated diffusion (correct)
  • Symport

Which type of transport involves carrier proteins that bind specific molecules and undergo a conformational change?

  • Primary active transport
  • Secondary active transport
  • Simple diffusion
  • Facilitated diffusion (correct)

In which type of transport do molecules move through transmembrane protein channels forming a pore that only allows the passage of water molecules?

  • Symport
  • Simple diffusion (correct)
  • Primary active transport
  • Secondary active transport

What is the characteristic feature of aquaporins in terms of transporting water molecules compared to simple diffusion?

<p>Faster transport speed (C)</p> Signup and view all the answers

Which type of transport involves the movement of positive charges towards the outside of the membrane to induce channel opening?

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

What do carrier proteins in facilitated diffusion bind to on one side of the membrane?

<p>Specific molecules (C)</p> Signup and view all the answers

Which process involves the transport of large molecules across the cell to the opposite domain of the plasma membrane?

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

Which type of vesicles are involved in transcytosis and do not fuse with lysosomes?

<p>Caveolae-derived vesicles (A)</p> Signup and view all the answers

Which integral membrane protein coats caveolae involved in transcytosis?

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

What causes a curvature in the lipid bilayer during caveola formation in transcytosis?

<p>Concentration of caveolin dimers (A)</p> Signup and view all the answers

Which process involves the uptake of selected molecules into small invaginations of the plasma membrane?

<p>Caveolae-mediated endocytosis (A)</p> Signup and view all the answers

During transcytosis, which of the following processes involves endocytosis followed by exocytosis without modification of vesicle contents?

<p>Transcytosis (C)</p> Signup and view all the answers

Which statement accurately describes the mechanism of glucose uptake in epithelial intestinal cells?

<p>Glucose is transported via secondary active transport, coupled with the movement of sodium ions down their electrochemical gradient. (D)</p> Signup and view all the answers

Which of the following statements accurately describes the role of the sodium/potassium pump in the glucose uptake process?

<p>The sodium/potassium pump establishes the electrochemical gradient for sodium ions, which drives the secondary active transport of glucose. (B)</p> Signup and view all the answers

Which of the following transport mechanisms is represented by the process labeled 'F' in the figure?

<p>Facilitated diffusion through a carrier protein (C)</p> Signup and view all the answers

What is the main driving force behind the secondary active transport of glucose in epithelial intestinal cells?

<p>The electrochemical gradient of sodium ions across the cell membrane (C)</p> Signup and view all the answers

Which of the following statements accurately describes the symport mechanism for glucose uptake?

<p>Glucose and sodium ions are transported simultaneously in the same direction across the cell membrane. (D)</p> Signup and view all the answers

Which of the following transport mechanisms directly utilizes ATP as an energy source?

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

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