Y1S2 009 I Biochem Carbohydrate Structure and Macromolecules
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Questions and Answers

What is the primary source of energy for the body?

  • Carbohydrates (correct)
  • Proteins
  • Lipids
  • Nucleic acids

    • What is the general empirical formula for carbohydrates?

  • Cn(H2O)p
  • Cn(H2O)n (correct)
  • Cn(H2O)m
  • Cn(H2O)q

    • What is the molecular formula of glucose?

  • C6H12O6 (correct)
  • C5H10O5
  • C8H16O8
  • C7H14O7

    • What are macromolecules composed of?

    <p>Smaller organic molecules (C)</p> Signup and view all the answers

    What is the role of carbohydrates in cell identification?

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

    If a carbohydrate has 7 carbons, what would be its molecular formula?

    <p>C7(H2O)7 (C)</p> Signup and view all the answers

    What is the carbonyl group used to classify carbohydrates into?

    <p>Aldehyde group or ketone group (A)</p> Signup and view all the answers

    What is the term used to describe carbohydrates with 3 to 10 sugar units?

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

    Which type of polysaccharide consists of different monosaccharides?

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

    What is the characteristic of an aldose?

    <p>Carbonyl on C1 (D)</p> Signup and view all the answers

    What is the suffix that indicates a molecule is a carbohydrate?

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

    How many carbon atoms do the most common monosaccharides have?

    <p>3-8 carbon atoms (D)</p> Signup and view all the answers

    What do the prefixes tri-, tetr-, pent- indicate in a monosaccharide?

    <p>The number of carbon atoms (A)</p> Signup and view all the answers

    What is the simplest form of monosaccharides?

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

    What is the reason for monosaccharides to exist in a cyclic form?

    <p>To increase stability (C)</p> Signup and view all the answers

    Which of the following monosaccharides does not have a chiral carbon atom?

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

    What is the consequence of the presence of asymmetric carbon atoms in monosaccharides?

    <p>Gain of optical activity (D)</p> Signup and view all the answers

    What is the role of glyceraldehyde in the study of monosaccharides?

    <p>It is used as a standard reference molecule (D)</p> Signup and view all the answers

    What type of stereoisomers are D-glyceraldehyde and L-glyceraldehyde?

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

    What is the characteristic of a pair of epimers?

    <p>They have opposite configurations at one or more chiral centres (D)</p> Signup and view all the answers

    What is the difference between pyranose and furanose ring structures?

    <p>Number of ring members (A)</p> Signup and view all the answers

    What is the importance of glucose in human metabolism?

    <p>It is the most important simple carbohydrate (A)</p> Signup and view all the answers

    What is the term for a monosaccharide that rotates polarized light to the right?

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

    What is the term for a monosaccharide that rotates polarized light to the left?

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

    What is the structural isomer of glucose?

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

    What is the result of excess galactose in the body?

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

    What is the type of bond formed between two monosaccharides?

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

    What is the disaccharide formed by the combination of glucose and galactose?

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

    What is the result of fructose intolerance?

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

    Which disaccharide is commonly called 'table sugar'?

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

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