Polysaccharides: Starch, Glycogen, Cellulose, Chitin
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Questions and Answers

What type of bonds do the substances described in the text form with water molecules?

  • Covalent bonds
  • Hydrogen bonds (correct)
  • Van der Waals forces
  • Ionic bonds

    • Why are the substances described as readily soluble in water?

  • They compete with hydrogen bonds (correct)
  • They form covalent bonds with water
  • They repel water molecules
  • They exhibit ionic properties

    • Which type of bonding is NOT mentioned in the text as contributing to the solubility of the substances in water?

  • Ionic bonds
  • Hydrogen bonds
  • Covalent bonds (correct)
  • Van der Waals forces

    • What feature of substances contributes to their successful competition with hydrogen bonds in water?

    <p>Non-polar nature</p> Signup and view all the answers

    How do substances' solubility relate to the strength of hydrogen bonds in water?

    <p>Strong hydrogen bonds lead to low solubility</p> Signup and view all the answers

    Which process is required to combine monosaccharides into di- or poly-saccharides?

    <p>Dehydration reaction</p> Signup and view all the answers

    Which of the following is a polymer of glucose among the listed polysaccharides?

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

    What is the function of cellulose in plants?

    <p>Structural component of cell walls</p> Signup and view all the answers

    Which polysaccharide is primarily found in the exoskeleton of arthropods and fungal cell walls?

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

    Amongst starch, glycogen, cellulose, and chitin, which one is NOT used for energy storage in organisms?

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

    Which statement best describes the close packing of the blocks mentioned in the text?

    <p>The blocks are densely packed with minimal empty spaces between them.</p> Signup and view all the answers

    How does the close packing of the blocks relate to the appearance of saturated fats?

    <p>It results in the blocks having a crystalline structure similar to saturated fats.</p> Signup and view all the answers

    What effect does close packing of molecules have on the physical state of substances?

    <p>It can lead to a solid state due to reduced molecular motion.</p> Signup and view all the answers

    How do tightly packed molecules affect the fluidity of substances?

    <p>They decrease fluidity by restricting movement between molecules.</p> Signup and view all the answers

    What role does close packing play in the stability of substances like saturated fats?

    <p>It increases stability by reducing molecular mobility and providing structural support.</p> Signup and view all the answers

    What characteristic of unsaturated fats allows them to be liquid at room temperature?

    <p>They contain bends or kinks in their structure</p> Signup and view all the answers

    How do the bends or kinks in unsaturated fats affect their fluidity?

    <p>Decrease fluidity by preventing tight stacking</p> Signup and view all the answers

    What is the primary reason why unsaturated fats are more fluid than saturated fats?

    <p>They contain double bonds that introduce kinks</p> Signup and view all the answers

    How does the fluidity of unsaturated fats compare to saturated fats?

    <p>Unsaturated fats are more fluid due to kinks preventing tight packing</p> Signup and view all the answers

    Which feature of unsaturated fats contributes most significantly to their flui​​d nature?

    <p>Multiple double bonds</p> Signup and view all the answers

    Which of the following best describes a population?

    <p>A group of individuals of the same species living together in one area</p> Signup and view all the answers

    What is the main difference between autotrophs and heterotrophs?

    <p>Heterotrophs transform energy from their environment</p> Signup and view all the answers

    What is an example of a trace element?

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

    Why are compounds more common than pure elements?

    <p>Elements have outer electron orbits that allow them to combine</p> Signup and view all the answers

    What does the atomic number of an element represent?

    <p>Number of protons in the nucleus</p> Signup and view all the answers

    How many electrons can the outermost shell of an atom contain at most?

    <p>8 electrons</p> Signup and view all the answers

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