Chemistry of Lipids: Definition and Functions
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Questions and Answers

Which of the following is a common property of lipids?

  • Insolubility in water (correct)
  • Solubility in polar solvents
  • Solubility in water
  • Insolubility in nonpolar solvents

    • What is the primary function of lipids as thermal insulators?

  • Conducting electrical signals
  • Providing insulation in subcutaneous tissues and around certain organs (correct)
  • Storing and providing energy
  • Acting as enzymes

    • Which type of lipids provide the body with fat-soluble vitamins?

  • Steroids
  • Waxes
  • Oils
  • Fats (correct)

    • In which cellular components do lipoproteins occur?

    <p>Cell membrane and mitochondria</p> Signup and view all the answers

    What diseases are associated with abnormal chemistry or metabolism of lipids?

    <p>Obesity</p> Signup and view all the answers

    Which of the following is an example of a small chain fatty acid?

    <p>Caproic acid</p> Signup and view all the answers

    What type of compounds are lipids related to more by their physical properties than by their chemical properties?

    <p>Carbohydrates</p> Signup and view all the answers

    What is the general formula for saturated fatty acids?

    <p>CnH2n+1COOH</p> Signup and view all the answers

    What is the molecular formula of stearic acid?

    <p>CH3(CH2)16COOH</p> Signup and view all the answers

    Which type of fatty acids contain one double bond?

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

    What are fats in their liquid state called?

    <p>Oils</p> Signup and view all the answers

    Which lipid molecule is derived from simple/compound lipids on hydrolysis?

    <p>Cholesterol</p> Signup and view all the answers

    What are esters of fatty acids with glycerol called?

    <p>Fats</p> Signup and view all the answers

    Which type of fatty acids occur mainly as esters in natural fats and oils?

    <p>Saturated Fatty Acids</p> Signup and view all the answers

    What are esters of fatty acids with higher molecular weight monohydric alcohols called?

    <p>Waxes</p> Signup and view all the answers

    What is the general formula for unsaturated fatty acids?

    <p>CnH2nCOOH</p> Signup and view all the answers

    Which of the following is not a function of lipids?

    <p>Facilitate the synthesis of carbohydrates</p> Signup and view all the answers

    Which type of compounds are lipids mainly related to based on their physical properties?

    <p>Nonpolar compounds</p> Signup and view all the answers

    What is the primary storage form of energy in lipids?

    <p>Triglycerides</p> Signup and view all the answers

    Which lipid functions as the main structural component of biomembranes?

    <p>Phospholipids</p> Signup and view all the answers

    In which cellular components do lipoproteins occur?

    <p>Cell membrane and mitochondria</p> Signup and view all the answers

    Which disease is associated with abnormal metabolism of lipids?

    <p>Atherosclerosis</p> Signup and view all the answers

    Which of the following is a characteristic of saturated fatty acids?

    <p>Solid at room temperature except if they are short chained</p> Signup and view all the answers

    What is the molecular formula of stearic acid?

    <p>C18H36O2</p> Signup and view all the answers

    Which type of fatty acids contain one double bond?

    <p>Monounsaturated fatty acids</p> Signup and view all the answers

    What are esters of fatty acids with higher molecular weight monohydric alcohols called?

    <p>Waxes</p> Signup and view all the answers

    Which of the following is an example of a small chain fatty acid?

    <p>Lauric acid</p> Signup and view all the answers

    What type of compounds are lipids related to more by their physical properties than by their chemical properties?

    <p>Carbohydrates</p> Signup and view all the answers

    What is the primary function of lipids as thermal insulators?

    <p>Insulation to retain body heat</p> Signup and view all the answers

    What type of fatty acids occur mainly as esters in natural fats and oils?

    <p>Saturated fatty acids</p> Signup and view all the answers

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