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Cellulose quiz

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  • What type of polysaccharide is cellulose?
    Cellulose is a homopolysaccharide, meaning it is composed of only one type of repeating sugar unit, D-glucose.
  • What type of glycosidic bond links the glucose units in cellulose?
    The glucose units in cellulose are linked by β-1,4-glycosidic bonds.
  • What is the primary structural function of cellulose in plants?
    Cellulose provides structural support in plant cell walls.
  • Is cellulose a branched or unbranched polysaccharide?
    Cellulose is an unbranched polysaccharide.
  • What is the repeating sugar unit found in cellulose?
    The repeating sugar unit in cellulose is D-glucose.
  • What is the name of the disaccharide found within cellulose?
    The disaccharide found within cellulose is cellobiose.
  • How are the glucose molecules arranged in cellulose?
    The glucose molecules are arranged in linear chains forming microfibrils.
  • Why is cellulose indigestible for most animals?
    Most animals lack the enzyme cellulase, which is required to hydrolyze β-1,4-glycosidic bonds in cellulose.
  • What enzyme is needed to break down cellulose?
    The enzyme needed to break down cellulose is cellulase.
  • What type of glycosidic linkage is found in cellobiose?
    Cellobiose contains a β-1,4-glycosidic linkage between two glucose molecules.
  • What property do β-glycosidic linkages confer to cellulose?
    β-glycosidic linkages confer rigidity and structural function to cellulose.
  • Where in plants is cellulose primarily found?
    Cellulose is primarily found in the cell walls of plant cells.
  • What is the consequence of animals lacking cellulase?
    Animals that lack cellulase cannot digest cellulose, making it indigestible for them.
  • What is the relationship between cellobiose and cellulose regarding digestion?
    Both cellobiose and cellulose are indigestible for most animals due to the β-1,4-glycosidic bonds.
  • What structural feature distinguishes cellulose from branched polysaccharides?
    Cellulose is composed of linear chains of glucose, unlike branched polysaccharides.