Biology · Biological Molecules
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Which type of bond is not responsible in maintaining the tertiary structure of proteins?
- A
Ionic bond
- B
Hydrogen bond
- C
Peptide bond
- D
Glycosidic
The type of bond that is not responsible for maintaining the tertiary structure of proteins is the peptide bond. Peptide bonds are responsible for linking individual amino acids together to form the primary structure of a protein, which is simply the linear sequence of amino acids.
The tertiary structure of a protein is the three-dimensional arrangement of the protein's polypeptide chain, resulting from interactions between amino acid residues that are not adjacent in the primary sequence. These interactions can be of various types, including:
1. Hydrogen bonds: These weak bonds form between the hydrogen atom of one amino acid's side chain and another atom (oxygen or nitrogen) in the side chain of a different amino acid.
2. Disulfide bonds: These covalent bonds are formed between the sulfur atoms of two cysteine residues in the protein, creating a bridge that stabilizes the protein's tertiary structure.
3. Ionic bonds (salt bridges): These are electrostatic interactions between charged amino acid side chains (e.g., positively charged lysine and arginine with negatively charged aspartate and glutamate).
4. Hydrophobic interactions: Nonpolar amino acid side chains tend to cluster together in the protein's interior to avoid water, stabilizing the tertiary structure.
5. Van der Waals forces: These weak attractions occur between atoms that are in close proximity, helping to stabilize the protein's tertiary structure.
The combination of these various interactions contributes to the overall folding and stability of the protein's tertiary structure, allowing it to perform its specific biological functions.
What Bonds Maintain Tertiary Protein Structure?
Hydrogen bonds
Disulfide bonds (covalent)
Ionic bonds
Hydrophobic interactions
Peptide bond
What Bonds Maintain Tertiary Protein Structure?
Hydrogen bonds
Disulfide bonds (covalent)
Ionic bonds
Hydrophobic interactions
Peptide bond
What Bonds Maintain Tertiary Protein Structure?
Hydrogen bonds
Disulfide bonds (covalent)
Ionic bonds
Hydrophobic interactions
Peptide bond
Glycosidic bonds are not responsible for maintaining the tertiary structure of proteins because they are found in carbohydrates, not proteins.
Explanation:
- Glycosidic bonds connect monosaccharides (sugar molecules) to form disaccharides (e.g., sucrose, lactose) or polysaccharides (e.g., starch, glycogen).
- They are involved in carbohydrate structure, not protein folding.
Tagged under Biology · Biological Molecules · 2021