Carbohydrates in Biology Quiz
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Questions and Answers

Which classification of carbohydrates includes short chains of monosaccharides?

  • Oligosaccharides (correct)
  • Disaccharides
  • Polysaccharides
  • Monosaccharides

    • What is the chemical formula representation of a carbohydrate?

  • $C_{n}H_{2n+2}O_n$
  • $C_nH_{3n}O_n$
  • $C_nH_{n}O_n$
  • $C_nH_{2n}O_n$ (correct)

    • What role do carbohydrates play in living organisms?

  • They serve predominantly as a storage mechanism.
  • They act mainly as signaling molecules.
  • They are primarily structural components.
  • They are a primary source of chemical energy. (correct)

    • Which of the following is NOT a common category of carbohydrates?

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

    What is primarily utilized by plants to synthesize carbohydrates?

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

    Which of the following accurately describes organic molecules?

    <p>They contain carbon combined with hydrogen and other elements.</p> Signup and view all the answers

    What is the primary characteristic that distinguishes inorganic molecules from organic molecules?

    <p>Inorganic molecules lack carbon atoms in their composition.</p> Signup and view all the answers

    What role do carbohydrates primarily serve in living organisms?

    <p>They are main sources of chemical energy.</p> Signup and view all the answers

    Which of the following is NOT classified as an organic molecule?

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

    What are the primary building blocks of polysaccharides?

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

    What is the primary function of monosaccharides in cells?

    <p>To obtain energy</p> Signup and view all the answers

    Which statement about the chemical formula of monosaccharides is correct?

    <p>It is expressed as (CH₂O)ₙ, where n indicates the number of carbon atoms</p> Signup and view all the answers

    How many carbon atoms are contained in a hexose?

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

    In a chemical reaction involving monosaccharides, what happens to the energy during bond breaking and forming?

    <p>Energy is released if old bonds have more energy</p> Signup and view all the answers

    Which of the following is NOT classified as a monosaccharide based on carbon count?

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

    What defines a monosaccharide as an aldose?

    <p>An aldehyde group at the terminal position</p> Signup and view all the answers

    Which reaction type leads to the formation of glucose-6-phosphate?

    <p>Formation of an ester from an acid and an alcohol</p> Signup and view all the answers

    What is a characteristic feature of oligosaccharides?

    <p>Composed of 2 to 10 monosaccharides linked by O-glycosidic linkages</p> Signup and view all the answers

    What happens during the hydrolysis of oligosaccharides?

    <p>They are broken down into monosaccharides, releasing energy</p> Signup and view all the answers

    Why are oligosaccharides significant for living organisms?

    <p>They act as important energy sources</p> Signup and view all the answers

    Which of the following correctly identifies the components of sucrose?

    <p>Glucose and fructose</p> Signup and view all the answers

    Which disaccharide is formed in mammary glands and primarily found in milk?

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

    What is the significance of maltose in relation to starch?

    <p>Two maltoses equal one starch molecule</p> Signup and view all the answers

    Which of the following statements about disaccharides is true?

    <p>Many oligosaccharides in living organisms are disaccharides</p> Signup and view all the answers

    Which disaccharide consists of two glucose molecules?

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

    What is the primary structural difference between starch and glycogen?

    <p>Starch branches every 24-30 glucose units, whereas glycogen branches every 8-12 glucose units.</p> Signup and view all the answers

    Which of the following accurately describes a characteristic of polysaccharides?

    <p>They are comprised of repeating units of the same or different monosaccharides.</p> Signup and view all the answers

    In which of the following organisms is glycogen primarily stored?

    <p>In the liver and muscles of mammals.</p> Signup and view all the answers

    What defines a homopolysaccharide as opposed to a heteropolysaccharide?

    <p>Homopolysaccharides are formed from repeating units of the same monosaccharide.</p> Signup and view all the answers

    What is the approximate number of glucose units in a starch molecule?

    <p>24-30 glucose units.</p> Signup and view all the answers

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