Organic Molecules and Functional Groups
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Questions and Answers

What is a functional group in organic molecules?

  • A group of atoms that always has the same chemical properties (correct)
  • A group of atoms that can vary in chemical properties
  • A group of atoms that has different properties in different molecules
  • A group of atoms that only react with water molecules

    • Which functional group contains a carbon double-bonded to an oxygen and a hydroxyl group?

  • Carboxyl group (correct)
  • Amino group
  • Sulfhydryl group
  • Phosphate group

    • What are monomers in the context of macromolecules?

  • Atoms with different chemical properties
  • Large molecules with unique properties
  • Small repeating subunits that serve as building blocks (correct)
  • Functional groups attached to polymers

    • Which process involves the loss of a water molecule to join monomers into polymers?

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

    What gives large biological molecules their unique properties?

    <p>The arrangement of their atoms</p> Signup and view all the answers

    Which category of biological molecules is mainly used as an immediate energy source?

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

    What type of chemical bond joins a functional group to the carbon skeleton of a large molecule?

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

    What kind of bond would be present in a completely flat section of a biological molecule?

    <p>B or C</p> Signup and view all the answers

    Which functional group is most important for DNA molecules?

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

    Which of the following can carbon-based molecules do because of the versatile bond structures formed by carbon?

    <p>All of the above</p> Signup and view all the answers

    What type of isomer is propanal compared to acetone?

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

    Which polysaccharide has the greatest number of branches?

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

    Which polysaccharide cannot be digested by humans and contains unbranched β glucose molecules?

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

    Which statement is true about lipids?

    <p>All lipids are made from glycerol and fatty acids.</p> Signup and view all the answers

    How does RNA differ from DNA?

    <p>DNA contains thymine; RNA contains uracil.</p> Signup and view all the answers

    If you heat a cell to a moderately higher temperature, which molecule will stop working first?

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

    In which pair does the first molecule determine the structure of the second?

    <p>DNA, protein</p> Signup and view all the answers

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