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

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

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

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

<p>Caproic acid (B)</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 (C)</p> Signup and view all the answers

What is the general formula for saturated fatty acids?

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

What is the molecular formula of stearic acid?

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

Which type of fatty acids contain one double bond?

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

What are fats in their liquid state called?

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

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

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

What are esters of fatty acids with glycerol called?

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

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

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

What is the general formula for unsaturated fatty acids?

<p>CnH2nCOOH (D)</p> Signup and view all the answers

Which of the following is not a function of lipids?

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

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

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

What is the primary storage form of energy in lipids?

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

Which lipid functions as the main structural component of biomembranes?

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

In which cellular components do lipoproteins occur?

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

Which disease is associated with abnormal metabolism of lipids?

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

What is the molecular formula of stearic acid?

<p>C18H36O2 (A)</p> Signup and view all the answers

Which type of fatty acids contain one double bond?

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

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

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

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

<p>Lauric acid (C)</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 (D)</p> Signup and view all the answers

What is the primary function of lipids as thermal insulators?

<p>Insulation to retain body heat (A)</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 (B)</p> Signup and view all the answers

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