Macromolecules and Proteins Overview
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Questions and Answers

Which type of macromolecule is synthesized by condensation reactions?

  • Nucleic acids
  • Polysaccharides
  • Proteins (correct)
  • Lipids
  • What is the role of enzymes in cells?

  • Catalysts for chemical reactions (correct)
  • Enable cell communication
  • Structural support
  • Transportation
  • How many common small molecules are used to synthesize most biological macromolecules in cells?

  • 30 (correct)
  • 20
  • 50
  • 40
  • Which category of proteins provides physical support and shape to cells?

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

    What is the characteristic of the R group for all amino acids?

    <p>Unique for each amino acid</p> Signup and view all the answers

    How many amino acids have hydrophilic R groups?

    <p>11</p> Signup and view all the answers

    What is the function of motility proteins in cells?

    <p>Contraction and movement</p> Signup and view all the answers

    Which type of proteins enable cells to respond to chemical stimuli from the environment?

    <p>Receptor proteins</p> Signup and view all the answers

    How many amino acids have nonpolar, hydrophobic R groups?

    <p>9</p> Signup and view all the answers

    What is the characteristic of the R groups for hydrophilic amino acids?

    <p>Polar or charged at cellular pH</p> Signup and view all the answers

    Why do proteins fall into nine major classes?

    <p>To serve different functions within the cell</p> Signup and view all the answers

    What is the unique characteristic of the α carbon atom in amino acids?

    <p>It is asymmetric</p> Signup and view all the answers

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