The tertiary structures of an protein can have covalent bonds and metal bonds.
This means that option C is the one that reveals false information about the proteins.
Proteins are formed as follows:
- Amino acids link together, forming a linear molecule that is the protein's primary structure.
- This primary structure begins to form hydrogen bridges in its own composition, creating the secondary structure.
- The secondary structure allows the formation of disulfide bridges, which are covalent bonds and, in special cases, allows the formation of metallic bonds between atoms. This is the tertiary structure.
- The quaternary structure, in turn, is formed by the tangle of several tertiary structures, which form a three-dimensional molecule, which gives functionality to the protein.
Thus, we can conclude that the tertiary structure is not only formed by covalent bonds.
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