Biochemistry LE 3: Lipid Chemistry, Digestion, and Absorption
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Questions and Answers

What is the number of carbon atoms in Oleic Acid?

  • 20
  • 18 (correct)
  • 22
  • 16

    • What is the location of the double bond in Oleic Acid?

  • At C8
  • At C11
  • At C9 (correct)
  • At C10

    • What is the classification of Linoleic Acid?

  • Essential
  • Saturated
  • Polyunsaturated (correct)
  • Monounsaturated

    • What is the omega designation of Linoleic Acid?

    <p>ω-6</p> Signup and view all the answers

    What is the number of double bonds in Linoleic Acid?

    <p>2</p> Signup and view all the answers

    What type of bond is naturally occurring in fatty acids?

    <p>Cis bond</p> Signup and view all the answers

    What is the effect of trans bonds on hydrocarbon chains?

    <p>It hardens them</p> Signup and view all the answers

    What type of fatty acid cannot be synthesized by the body?

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

    What is the result of the reaction between glycerol and fatty acids?

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

    What type of bond is formed between glycerol and fatty acids?

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

    What is the classification of glycerol with one fatty acid attached?

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

    What is the characteristic of triglycerides that makes them insoluble in water?

    <p>Hydrophobic nature</p> Signup and view all the answers

    What is the term for triglycerides that are solid at room temperature?

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

    What type of fatty acids are commonly found in oils?

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

    What is the name of the bond formed between the 2nd carbon atom of glycerol and a fatty acid?

    <p>Secondary ester bond</p> Signup and view all the answers

    What type of lipids have a phosphate group?

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

    What is formed when pancreatic lipase acts on TAG?

    <p>Monoglycerides and FFA</p> Signup and view all the answers

    What determines the absorption of fat digestion products?

    <p>Size of the products</p> Signup and view all the answers

    Where do long-chain fatty acids and monoglycerides enter after leaving the micelle?

    <p>Epithelial cells</p> Signup and view all the answers

    What is the role of cholesterol in the cell membrane?

    <p>Structural component</p> Signup and view all the answers

    What is a characteristic of steroids?

    <p>Hydrophobic and insoluble in water</p> Signup and view all the answers

    What is the precursor to vitamin D, testosterone, and estrogen?

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

    What is the mode of transport for chylomicrons away from the intestine?

    <p>Lymphatic system</p> Signup and view all the answers

    Why are steroids considered important?

    <p>They are precursors to various important substances</p> Signup and view all the answers

    What is the main difference between glycolipids and sphingomyelin?

    <p>Presence of a carbohydrate group</p> Signup and view all the answers

    Which type of glycolipid is found in neurons and white matter?

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

    What is the name of the disease caused by the deficiency of hexosaminidase A?

    <p>Tay-Sachs disease</p> Signup and view all the answers

    What is the function of the enzyme α-galactosidase?

    <p>Breaks down ceramide trihexoside</p> Signup and view all the answers

    Which of the following is NOT a type of glycolipid?

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

    What is the name of the disease caused by the deficiency of β-galactosidase?

    <p>Krabbe's disease</p> Signup and view all the answers

    What bond is formed between the carbohydrate group and the ceramide in glycolipids?

    <p>Glycosidic bond</p> Signup and view all the answers

    What is the name of the disease caused by the deficiency of β-glucosidase?

    <p>Gaucher's disease</p> Signup and view all the answers

    Why does arachidonic acid have a lower melting point than linoleic acid?

    <p>It has a higher number of double bonds</p> Signup and view all the answers

    How many kilocalories are equivalent to 1 gram of lipid?

    <p>9 kcal</p> Signup and view all the answers

    What is the main reason why long chain saturated fatty acids have higher melting points?

    <p>They do not have double bonds</p> Signup and view all the answers

    What is the main component of lung surfactant?

    <p>Dipalmitoyl phosphatidylcholine</p> Signup and view all the answers

    What is the precursor of estrogen?

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

    What is the role of micelles in the small intestine?

    <p>Facilitate absorption of lipids</p> Signup and view all the answers

    What is the parent compound of prostaglandins?

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

    What type of fatty acids are directly transported to the liver?

    <p>Short and medium chain fatty acids</p> Signup and view all the answers

    What is the role of chylomicrons in the intestine?

    <p>Package and transport long chain fatty acids</p> Signup and view all the answers

    What is the result of a lack of lung surfactant in newborns?

    <p>Respiratory distress syndrome</p> Signup and view all the answers

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