Cell Membrane Lipid Structure

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Questions and Answers

What is the main characteristic that differentiates saturated fats from unsaturated fats?

  • Solubility in water
  • Number of carbon atoms
  • Presence of nitrogen
  • Presence of double bonds in the chemical structure (correct)

Why are saturated fats called 'saturated'?

  • They are 'saturated' with hydrogen atoms (correct)
  • Due to their high carbon content
  • Because of their ability to dissolve in water
  • Due to the presence of phosphorus

Which solvent is NOT suitable for dissolving lipids?

  • Chloroform
  • Ether
  • Carbon tetrachloride
  • Water (correct)

What type of unsaturated fat contains only one double bond in its structure?

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

What is the classification of a fat or oil that has different R-groups?

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

Which type of esters are generally solids due to a higher percentage of saturated fatty acids in the R groups?

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

How can oils be converted into fats?

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

Which type of lipids contain phosphoric acid and a nitrogen base along with glycerol and fatty acids?

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

Which part of a phospholipid molecule is hydrophilic?

<p>The phosphate group (A)</p> Signup and view all the answers

What is the main property that makes soap effective in removing oil and grease stains?

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

Which type of lipids are the basic structural elements of all living organisms?

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

What is the main difference between cephalin and sphingolipids in terms of their composition?

<p>Type of alcohol (D)</p> Signup and view all the answers

Why are vitamins classed under lipids?

<p>Because of their solubility in fats. (D)</p> Signup and view all the answers

What is the role of LDL cholesterol in the body?

<p>Raises the risk for heart disease and stroke. (A)</p> Signup and view all the answers

What is the primary function of cholesterol in cells?

<p>Contribute to the structure of cell membranes. (B)</p> Signup and view all the answers

Why are glycolipids mentioned in the text?

<p>Because they contain a complex alcohol and nitrogen but no phosphorus. (B)</p> Signup and view all the answers

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