Carbohydrates: Monosaccharides and Disaccharides
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Questions and Answers

What is the characteristic of monosaccharides in terms of taste?

  • Bitter
  • Sweet (correct)
  • Sour
  • Saline
  • Which of the following is an example of a disaccharide?

  • Cellulose
  • Glucose
  • Sucrose (correct)
  • Starch
  • What is the function of glycogen in animal cells?

  • Stores energy for quick energy release (correct)
  • Regulates the cell's water balance
  • Maintains the pH balance of the cell
  • Provides structural support to animals
  • Which of the following is a characteristic of polysaccharides?

    <p>Insoluble in water</p> Signup and view all the answers

    What is the function of cellulose in plant cells?

    <p>Provides structural support to plants</p> Signup and view all the answers

    What is the characteristic of cellulose in terms of digestibility?

    <p>Not digestible by humans, but important for fiber intake</p> Signup and view all the answers

    What is the smallest unit of a carbohydrate molecule?

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

    What type of bond forms between monosaccharides to create a polysaccharide?

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

    What is the general formula for monosaccharides?

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

    What is the name of the monosaccharide containing six carbon atoms in each molecule?

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

    What is the process by which a polysaccharide is broken down into monosaccharides?

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

    What is the name of the bond formed between two monosaccharides in a disaccharide?

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

    What are the two polysaccharides that starch is composed of?

    <p>Amylose and amylopectin</p> Signup and view all the answers

    What type of bonds join glucose molecules in amylose?

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

    Why is starch suitable for energy storage?

    <p>It is insoluble and compact, allowing for a lot of energy to be stored in a small space</p> Signup and view all the answers

    What is the function of cellulose in plant cells?

    <p>To provide structural support and stop the cell wall from bursting</p> Signup and view all the answers

    What is the characteristic of cellulose molecules?

    <p>Long, unbranched chains of beta glucose</p> Signup and view all the answers

    What can be used to test for the presence of reducing sugars?

    <p>Benedict's reagent</p> Signup and view all the answers

    What is the result of the condensation reaction between two monosaccharides?

    <p>A molecule of water is produced</p> Signup and view all the answers

    What type of glycosidic bond is formed between two alpha glucose molecules in the formation of maltose?

    <p>1, 4 glycosidic bond</p> Signup and view all the answers

    Which monosaccharides are condensed to form sucrose?

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

    What is the characteristic of glycogen that allows for quick energy release?

    <p>It has a large number of side branches</p> Signup and view all the answers

    What is the reason why glycogen does not affect the water potential of cells?

    <p>It is insoluble in water</p> Signup and view all the answers

    What type of glucose molecules are involved in the formation of starch?

    <p>Only alpha glucose</p> Signup and view all the answers

    Study Notes

    Carbohydrates

    Monosaccharides

    • Simple sugars, cannot be broken down into simpler sugars
    • Examples:
      • Glucose (dextrose or grape sugar)
      • Fructose (fruit sugar)
      • Galactose (milk sugar)
    • Characteristics:
      • Sweet taste
      • Soluble in water
      • Can be fermented by yeast

    Disaccharides

    • Composed of two monosaccharides linked together
    • Examples:
      • Sucrose (table sugar) = glucose + fructose
      • Lactose (milk sugar) = glucose + galactose
      • Maltose = glucose + glucose
    • Characteristics:
      • Can be broken down into two monosaccharides
      • Soluble in water

    Polysaccharides

    • Composed of three or more monosaccharides linked together
    • Examples:
      • Starch (plant energy storage)
      • Glycogen (animal energy storage)
      • Cellulose (plant structural component)
    • Characteristics:
      • Insoluble in water
      • Can be broken down into simpler sugars

    Glycogen

    • A polysaccharide stored in animal liver and muscle cells
    • Composed of glucose molecules linked together
    • Function:
      • Energy storage for quick energy release
    • Characteristics:
      • Similar to starch, but more branched
      • Rapidly broken down into glucose for energy

    Cellulose

    • A polysaccharide composing plant cell walls
    • Composed of glucose molecules linked together
    • Function:
      • Provides structural support to plants
    • Characteristics:
      • Insoluble in water
      • Not digestible by humans, but important for fiber intake

    Carbohydrates

    • Monosaccharides are simple sugars that cannot be broken down into simpler sugars
      • Examples: glucose, fructose, galactose
      • Characteristics: sweet taste, soluble in water, can be fermented by yeast

    Disaccharides

    • Composed of two monosaccharides linked together
      • Examples: sucrose (table sugar) = glucose + fructose, lactose (milk sugar) = glucose + galactose, maltose = glucose + glucose
      • Characteristics: can be broken down into two monosaccharides, soluble in water

    Polysaccharides

    • Composed of three or more monosaccharides linked together
      • Examples: starch (plant energy storage), glycogen (animal energy storage), cellulose (plant structural component)
      • Characteristics: insoluble in water, can be broken down into simpler sugars

    Glycogen

    • A polysaccharide stored in animal liver and muscle cells
      • Composed of glucose molecules linked together
      • Function: energy storage for quick energy release
      • Characteristics: similar to starch, but more branched, rapidly broken down into glucose for energy

    Cellulose

    • A polysaccharide composing plant cell walls
      • Composed of glucose molecules linked together
      • Function: provides structural support to plants
      • Characteristics: insoluble in water, not digestible by humans, but important for fiber intake

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    Description

    Learn about the different types of carbohydrates, including monosaccharides and disaccharides. Understand their characteristics and examples.

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