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Interactions that create tertiary and quaternary protein structures include _____________________Group of answer choicesHydrophobic and S-S bondsIonic and H bondsCovalent and H bondsH bonds, disulfide linkages, hydrophobic interactions, and salt bridges

Question

Interactions that create tertiary and quaternary protein structures include _____________________Group of answer choicesHydrophobic and S-S bondsIonic and H bondsCovalent and H bondsH bonds, disulfide linkages, hydrophobic interactions, and salt bridges

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Solution

The interactions that create tertiary and quaternary protein structures include Hydrogen bonds, disulfide linkages, hydrophobic interactions, and salt bridges.

Here's a step-by-step explanation:

  1. Hydrogen Bonds: These are weak bonds that occur when a hydrogen atom bonded to a highly electronegative atom (like oxygen or nitrogen) is attracted to another electronegative atom in a different molecule or in a different part of the same molecule.

  2. Disulfide Linkages: These are covalent bonds that form between two cysteine residues in a protein. The sulfur of one cysteine bonds with the sulfur of another cysteine to create a disulfide bridge or bond, which helps stabilize the protein structure.

  3. Hydrophobic Interactions: These interactions occur between nonpolar amino acids. In an aqueous environment, the nonpolar (hydrophobic) regions of the protein tend to cluster together, away from the water, which helps to fold the protein into its correct shape.

  4. Salt Bridges: These are ionic bonds that form between positively and negatively charged amino acids. They help stabilize the protein structure by neutralizing these charges.

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List the types of bonding that determine the tertiary structure of a protein. (3 marks)

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