Biochemistry Chapter Quiz
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Questions and Answers

What percentage of cellular mass is typically made up of water?

  • 50%
  • 30%
  • 70% or more (correct)
  • 90%
  • Which property of water allows it to form hydrogen bonds with other polar molecules?

  • Low molecular weight
  • Polarity (correct)
  • High viscosity
  • High density
  • Which of the following sugars is classified as a triose?

  • Ribose
  • Glyceraldehyde (correct)
  • Starch
  • Glucose
  • Which type of molecules are considered hydrophilic?

    <p>Polar molecules</p> Signup and view all the answers

    What is the primary carbon linkage in glycogen?

    <p>Carbon 1 to Carbon 4</p> Signup and view all the answers

    What is the main reason nonpolar molecules cluster together in water?

    <p>To minimize contact with water</p> Signup and view all the answers

    Why are polar and nonpolar interactions important in biological structures?

    <p>They are crucial for the formation of structures like cell membranes</p> Signup and view all the answers

    Which sugar forms a ring structure in both α and β configurations?

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

    Which of these is considered a pentose?

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

    What distinguishes trioses from hexoses?

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

    What type of polysaccharide is characterized by a linear, non-branched structure?

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

    Which glycosidic bond connects the glucose molecules in both glycogen and amylose?

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

    Which polysaccharide primarily serves as a storage form of glucose?

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

    What structural characteristic distinguishes glycogen from amylose?

    <p>Branched structures</p> Signup and view all the answers

    What is the main function of cellulose in plants?

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

    What is the primary role of simple sugars like glucose in cells?

    <p>To provide energy and building blocks for cellular components</p> Signup and view all the answers

    Which statement about polysaccharides is correct?

    <p>They can serve as both energy storage and structural elements.</p> Signup and view all the answers

    What type of bond forms between monosaccharides?

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

    Which of the following chains of sugars is referred to as oligosaccharides?

    <p>Chains containing two to four monosaccharides</p> Signup and view all the answers

    Which of the following is an accurate representation of the basic structure of carbohydrates?

    <p>(CH₂O)n</p> Signup and view all the answers

    Which statement about the structure of polysaccharides is correct?

    <p>Cellulose possesses long linear chains formed by 1-4 glycosidic bonds.</p> Signup and view all the answers

    What role do oligosaccharides play in cellular functions?

    <p>They help in cell signaling and communication between cell parts.</p> Signup and view all the answers

    Which characteristic is NOT true for glycogen and starch?

    <p>Both contain 1-4 glycosidic bonds only.</p> Signup and view all the answers

    What are the primary functions of lipids in cells?

    <p>Operating as signaling molecules and structural components.</p> Signup and view all the answers

    What type of glycosidic bonds are primarily found in cellulose?

    <p>1-4 glycosidic bonds.</p> Signup and view all the answers

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