Biochemistry: D-Glucose and Cellulose Digestion Quiz
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Questions and Answers

What classifies monosaccharides?

  • Presence of a carboxylic acid group
  • Presence of an aldehyde or ketone group (correct)
  • Number of nitrogen atoms in the molecule
  • Number of carbon atoms in the molecule

    • Which suffix is used for naming aldose sugars based on the number of carbon atoms?

  • -ose (correct)
  • -ase
  • -ine
  • -ulose

    • What determines whether a sugar belongs to the D or L series?

  • Number of double bonds in the molecule
  • Orientation of H and OH groups around carbon atom 5 (correct)
  • Presence of a methyl group
  • Location of the ketone group

    • Which form of D-glucose is commonly used as a carbohydrate supplementation?

    <p>α-D-glucose</p> Signup and view all the answers

    Which disaccharide is formed by the combination of glucose and fructose?

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

    Which disaccharide is found in milk and composed of glucose and galactose?

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

    Which disaccharide is a cleavage product of starch?

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

    What type of bond links the anomeric hydroxyls of glucose and fructose in sucrose?

    <p>α(1→4) glycosidic bond</p> Signup and view all the answers

    What is the most important carbohydrate in the milk of mammals?

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

    Which monosaccharides make up sucrose?

    <p>Glucose + Fructose</p> Signup and view all the answers

    What type of linkages are present in amylose?

    <p>(1→4) linkages</p> Signup and view all the answers

    Why can humans not digest cellulose?

    <p>Due to lack of essential enzymes for breaking beta linkages</p> Signup and view all the answers

    What are the enzymes responsible for breaking down maltose, lactose, and sucrose into smaller bits in the intestine?

    <p>Maltase, lactase, sucrase</p> Signup and view all the answers

    Which disorder is characterized by the inability to metabolize lactose effectively?

    <p>Lactose intolerance</p> Signup and view all the answers

    What is the primary sugar found in milk that can be broken down into glucose and galactose?

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

    Which enzyme deficiency leads to the inability to digest sucrose effectively?

    <p>Sucrase deficiency</p> Signup and view all the answers

    What is the main sugar found in beer and bread that can be broken down into glucose?

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

    Which blood glucose level typically characterizes hypoglycemia?

    <p>&lt; 50 mg/dL</p> Signup and view all the answers

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