Cell Membrane Structure Quiz

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Questions and Answers

Which of the following is true about the cell membrane?

  • It consists of a single layer of phospholipids.
  • It does not contain any membrane proteins.
  • It contains cholesterols interspersed between phospholipids. (correct)
  • It is impermeable to ions and organic molecules.

What is the role of integral proteins in the cell membrane?

  • They serve as membrane transporters. (correct)
  • They facilitate interaction with the cell's environment.
  • They loosely attach to the outer side of the cell membrane.
  • They control the movement of substances in and out of a cell.

Which component of the cell membrane helps maintain appropriate membrane fluidity?

  • Cholesterols (correct)
  • Integral proteins
  • Peripheral proteins
  • Glycolipids

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

<p>They facilitate interaction with the cell's environment. (A)</p> Signup and view all the answers

What is the role of glycolipids in the cell membrane?

<p>They maintain appropriate membrane fluidity. (D)</p> Signup and view all the answers

Which type of active transport uses ATP as a source of energy?

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

What is the main difference between active transport and passive transport?

<p>Active transport requires cellular energy, while passive transport does not (A)</p> Signup and view all the answers

What are the two types of active transport mentioned in the text?

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

Which physiological processes rely on active transport?

<p>Nutrient uptake, hormone secretion, and nerve impulse transmission (D)</p> Signup and view all the answers

What is the role of the sodium-potassium pump in active transport?

<p>To pump sodium ions out of the cell and potassium ions into the cell (B)</p> Signup and view all the answers

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