Which of the following statements is true concerning the tertiary (3°) structure of proteins?
Beta sheet is an example of this type of structure
Often held together by disulfide bonds
Only held together by peptide bonds
Refers to the amino acid sequence of a protein
Refers to the association of two or more polypeptide chains together
Answer: Statement 1 is true concerning the tertiary structure. Because tertiary strucrure of protein is held by ionic bond, hydrophobic bond, hydrogen bond and disulfide bonds
Statement 2 is false because it says only Peptide where as the as discussed in the above statement it is held by ionic bond, hydrophobic bond, hydrogen bond and disulfide bonds. Statement 2 is true for primary structure.
Statement 3 is false because it does not refers to teritiary structure but primary structure which is a sequence of amino acids in a polypeptide chain.
Structure 4 is false because tertiary structure will have only a single polypeptide chain associated with protein domains
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