Biological Membranes Composition Quiz
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Questions and Answers

What is the role of lipoproteins in the body?

  • To store energy in adipose tissue
  • To provide structural support in cell membranes
  • To act as enzymes in metabolic pathways
  • To transport hydrophobic lipids in the aqueous blood plasma (correct)

Which of the following statements about glycerophospholipids is true?

  • They are used for energy storage
  • They are non-polar molecules
  • They are the main component of biological membranes (correct)
  • They are involved in signal transduction pathways

What is the function of the lipid bilayer in cell membranes?

  • To store energy in the form of triacylglycerols
  • To act as a barrier and regulate the movement of substances in and out of the cell (correct)
  • To catalyze biochemical reactions
  • To transport lipids in the blood

Which of the following is a non-hydrolyzable lipid?

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

What is the primary function of sterols like cholesterol in biological membranes?

<p>To maintain membrane fluidity and permeability (A)</p> Signup and view all the answers

Which of the following is a complex lipid?

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

What is the primary function of lipids in the human body?

<p>To store and provide energy (B)</p> Signup and view all the answers

Which of the following lipids is involved in cell signaling pathways?

<p>Sphingosine-1-phosphate (C)</p> Signup and view all the answers

What is the role of the iodine number in the characterization of lipids?

<p>To determine the degree of saturation in fatty acids (C)</p> Signup and view all the answers

Which of the following statements about lipid hydrogenation is true?

<p>It is used to protect lipids from oxidation and rancidity (C)</p> Signup and view all the answers

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