Carbohydrates Overview Quiz
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Questions and Answers

What is a key characteristic that distinguishes polysaccharides from monosaccharides?

  • Polysaccharides have a smaller particle size.
  • Polysaccharides are sweet in taste.
  • Polysaccharides are soluble in water.
  • Polysaccharides do not pass through a membrane. (correct)
  • What process describes the formation of glycogen from glucose in the body?

  • Glycogenesis (correct)
  • Catabolism
  • Fermentation
  • Lipidogenesis
  • Which of the following is true about cellulose?

  • It is a soluble fiber digested easily by humans.
  • It is composed mainly of glycosaminoglycans.
  • It serves a structural purpose in plants. (correct)
  • It contributes to the sweet taste of plant tissues.
  • What product is formed during the hydrolysis of starch?

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

    What role does glycosaminoglycans serve in the human body?

    <p>Lubrication in connective tissue and joints.</p> Signup and view all the answers

    Which polysaccharide is known for being stored energy in plants?

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

    What primarily happens when starch is placed in boiling water?

    <p>The granules rupture forming a paste.</p> Signup and view all the answers

    What is one function of dextran in the human body?

    <p>It acts as a blood extenders and helps maintain blood volume.</p> Signup and view all the answers

    What distinguishes glucose from fructose at a structural level?

    <p>Glucose contains an aldehyde group while fructose contains a ketone.</p> Signup and view all the answers

    Which of the following is a common feature of disaccharides?

    <p>They are typically solid and crystalline.</p> Signup and view all the answers

    Which disaccharide is known as milk sugar?

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

    What is the primary purpose of hydrolyzing starch in the production of maltose?

    <p>To break it down into smaller sugar units.</p> Signup and view all the answers

    Which characteristic of sucrose makes it unlike lactose in terms of fermentation by yeast?

    <p>Sucrose can ferment while lactose cannot due to the absence of lactase.</p> Signup and view all the answers

    Which statement accurately describes polysaccharides?

    <p>They are composed of many monosaccharide molecules.</p> Signup and view all the answers

    What is the normal range for glucose levels in the blood?

    <p>70-110 mg/dL</p> Signup and view all the answers

    What process results in the formation of monosaccharides from disaccharides?

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

    Why were cyclamates banned in the USA after 1969?

    <p>They were associated with cancer in rats.</p> Signup and view all the answers

    Study Notes

    Carbohydrates

    • Common sugars and starches, produced in plants and used as an energy source by animals.
    • Monosaccharides are the simplest form of carbohydrates.
    • Disaccharides are formed by combining two monosaccharides.
    • Polysaccharides are large polymers formed by many monosaccharides linked together.

    Monosaccharides

    • Examples include glucose and fructose.
    • Glucose is also known as dextrose or blood sugar.
    • Galactose is one of the two monosaccharides that form lactose.

    Disaccharides

    • Typically sweet, white, solid and crystalline.
    • Examples include sucrose, maltose, and lactose.
    • Sucrose, known as cane sugar, is commonly used for sweetening.
    • Maltose, or malt sugar, is found in germinating grains.
    • Lactose, or milk sugar, is found in milk and fermented to produce lactic acid.

    Polysaccharides

    • Polymers of monosaccharides that are tasteless and insoluble in water.
    • They are too large to pass through cell membranes.

    Types of Polysaccharides

    • Starch is a stored form of energy in plants, found in amylopectin and amylose.
    • Cellulose provides structural support for plants and is indigestible by humans.
    • Glycogen is stored in the liver and muscles, acting as a reserve supply of glucose.
    • Dextrin is an intermediate product formed during starch hydrolysis.
    • Heparin is an anticoagulant found in the body.
    • Dextran is used as a blood extender and can contribute to dental plaque formation.

    Carbohydrate Derivatives

    • Glycosaminoglycans are a gel-like substance that lubricates connective tissues and joints.

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    Description

    Test your knowledge on carbohydrates, including monosaccharides, disaccharides, and polysaccharides. This quiz covers their structures, examples, and functions in living organisms. Perfect for anyone looking to enhance their understanding of this essential macronutrient.

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