Protein Structures: Secondary and Tertiary Structure
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Questions and Answers

What type of structure represents the overall folding of polypeptide chains?

  • Secondary structure
  • Primary structure
  • Tertiary structure (correct)
  • Quaternary structure
  • Which structure of proteins is held together by intermolecular hydrogen bonds and resembles pleated folds?

  • Tertiary structure
  • Primary structure
  • Quaternary structure
  • Secondary structure (correct)
  • What is the main force that stabilizes the secondary and tertiary structures of proteins?

  • Ionic bonds
  • Disulfide linkages (correct)
  • Hydrophobic interactions
  • Covalent bonds
  • Which molecular shape can the tertiary structure of proteins give rise to?

    <p>Fibrous shape</p> Signup and view all the answers

    What is the spatial arrangement of sub-units in proteins known as?

    <p>Quaternary structure</p> Signup and view all the answers

    Which protein structure represents the folding of polypeptide chains beyond the primary structure?

    <p>Secondary structure</p> Signup and view all the answers

    What is the product called when three amino acids are linked together?

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

    Which structure is formed in fibrous proteins when polypeptide chains run parallel and are held together by hydrogen and disulphide bonds?

    <p>B-pleated sheet structure</p> Signup and view all the answers

    What is the structure called when the chains of polypeptides coil around to give a spherical shape?

    <p>Secondary structure</p> Signup and view all the answers

    Which type of protein is generally insoluble in water and exhibits a fiber-like structure?

    <p>Fibrous protein</p> Signup and view all the answers

    In which type of protein structure do the polypeptide chains form a coiled, spring-like shape?

    <p>Tertiary structure</p> Signup and view all the answers

    Which type of protein structure involves polypeptide chains running parallel and forming hydrogen and disulphide bonds?

    <p>Fibrous protein</p> Signup and view all the answers

    What is the primary structure of a protein defined as?

    <p>The sequence of amino acids linked with each other in a specific order</p> Signup and view all the answers

    Which structure of protein involves hydrogen bonding between the -NH and -CO groups of the peptide bond?

    <p>Secondary structure</p> Signup and view all the answers

    In which structure does a polypeptide chain form all possible hydrogen bonds by twisting into a right-handed screw?

    <p>Secondary structure</p> Signup and view all the answers

    What type of structure is formed when the backbone of the polypeptide chain folds into a zigzag pattern?

    <p>Secondary structure</p> Signup and view all the answers

    Which level of protein structure refers to the overall 3D shape of a protein?

    <p>Tertiary structure</p> Signup and view all the answers

    What is the quaternary structure of a protein defined as?

    <p>The overall 3D shape of a protein with multiple polypeptide chains</p> Signup and view all the answers

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