Biology for Engineers: Building Blocks of Life CO1 CO5

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Questions and Answers

What type of interactions contribute to the tertiary structure of a polypeptide?

  • Hydrogen bonds and ionic bonds
  • Hydrophobic interactions and van der Waals interactions
  • Covalent bonds and disulfide bridges
  • All of the above (correct)

What is the purpose of hydrophobic interactions in the tertiary structure of a polypeptide?

  • To bring nonpolar amino acid side chains together at the core of the protein
  • To exclude water molecules from the protein's interior
  • To stabilize the overall shape of the protein
  • All of the above (correct)

How do disulfide bridges form in a polypeptide?

  • When van der Waals interactions occur between nonpolar amino acid side chains
  • When two hydrogen-bonding amino acid side chains interact
  • When two positively charged amino acid side chains form an ionic bond
  • When two cysteine monomers with sulfhydryl groups on their side chains are brought close together by the folding of the protein (correct)

How do turns and loops differ in their contribution to the tertiary structure of a polypeptide?

<p>Turns have well-defined structures, while loops can be formed in many different ways (D)</p> Signup and view all the answers

What is the role of van der Waals interactions in the tertiary structure of a polypeptide?

<p>They help hold together clusters of nonpolar amino acid side chains at the core of the protein (A)</p> Signup and view all the answers

How do hydrogen bonds and ionic bonds contribute to the tertiary structure of a polypeptide?

<p>They help stabilize the overall shape of the protein by interacting between polar and charged side chains (B)</p> Signup and view all the answers

What is the purpose of the hydrophobic core of a protein?

<p>To exclude water molecules and stabilize the overall shape of the protein (C)</p> Signup and view all the answers

How do covalent disulfide bridges contribute to the tertiary structure of a protein?

<p>They further reinforce the shape of the protein by forming additional covalent bonds (B)</p> Signup and view all the answers

What is the overall purpose of the different interactions that contribute to the tertiary structure of a polypeptide?

<p>To exclude water molecules and stabilize the overall shape of the protein (C)</p> Signup and view all the answers

How do turns and loops differ in their contribution to the tertiary structure of a polypeptide?

<p>Loops are more flexible and can be formed in many different ways, while turns have well-defined structures (C)</p> Signup and view all the answers

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