Understanding Fatty Acids and Triglycerides
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Questions and Answers

Which type of fatty acid has only single bonds between carbon atoms?

  • Polyunsaturated
  • Saturated (correct)
  • Trans fat
  • Monounsaturated
  • What characteristic distinguishes monounsaturated fatty acids from saturated fatty acids?

  • Presence of triple bonds
  • Presence of multiple double bonds
  • Presence of one double bond (correct)
  • Absence of any double bonds
  • Which of the following is an example of a polyunsaturated fatty acid?

  • Omega 3 (correct)
  • Palmitic acid
  • Oleic acid
  • Stearic acid
  • What effect do double bonds have on the structure of fatty acids?

    <p>They introduce kinks to the chain (D)</p> Signup and view all the answers

    What is the chemical formula for oleic acid?

    <p>CH₃(CH₂)​7CH=CH(CH₂)​9COOH (A)</p> Signup and view all the answers

    What is the process called when fatty acids join with glycerol?

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

    What type of bond is formed between the glycerol and fatty acids during this process?

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

    How many water molecules are lost when forming a triglyceride from glycerol and three fatty acids?

    <p>3 (C)</p> Signup and view all the answers

    Which of the following describes the end product of the reaction between glycerol and fatty acids?

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

    What structural component is essential for the formation of the ester bonds in triglycerides?

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

    What characteristic of phospholipids allows them to form a bilayer in cell membranes?

    <p>Phospholipids are amphipathic. (A)</p> Signup and view all the answers

    In the phospholipid bilayer, which direction do the hydrophobic tails face?

    <p>Inwards, away from the aqueous environment. (D)</p> Signup and view all the answers

    Which of the following statements about the heads of phospholipids is true?

    <p>They are hydrophilic and interact with water. (C)</p> Signup and view all the answers

    What component of phospholipids is primarily responsible for their amphipathic nature?

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

    How do phospholipids arrange themselves in an aqueous environment?

    <p>They align with heads facing water and tails facing away. (B)</p> Signup and view all the answers

    Flashcards

    Condensation Reaction

    A chemical reaction where two molecules combine to form a larger molecule, releasing a water molecule.

    Ester Bond

    The type of bond that forms between a glycerol molecule and a fatty acid.

    Triglyceride

    A molecule with three fatty acids linked to a glycerol backbone.

    Glycerol

    A three-carbon alcohol molecule that forms the backbone of triglycerides.

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    Fatty Acids

    Long chains of hydrocarbons with a carboxyl group at one end.

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    Saturated fatty acid

    A fatty acid with only single bonds between its carbon atoms, making it straight and saturated with hydrogen.

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    Unsaturated fatty acid

    A fatty acid with one or more double bonds between its carbon atoms, causing a 'kink' in the molecule.

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    Omega-3 fatty acid

    The point where the first double bond appears in an omega-3 fatty acid.

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    What are phospholipids?

    A type of lipid that forms the basis of cell membranes.

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    What is the head of a phospholipid?

    The phosphate group attached to the glycerol molecule.

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    What are the tails of a phospholipid?

    The two fatty acid chains attached to the glycerol molecule.

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    What does it mean for a molecule to be amphipathic?

    A molecule that has both hydrophilic (water-loving) and hydrophobic (water-hating) parts.

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    What is a phospholipid bilayer?

    The arrangement of phospholipids in a cell membrane, with hydrophilic heads facing the outside and hydrophobic tails facing the inside.

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