Question

the chemicals dtt and beta - mercaptoethanol break disulfide bonds. a single polypeptide chain exposed to either one of these chemicals would potentially have changes in which level of protein structure? select all options that apply. secondary structure primary structure tertiary structure quaternary structure

Explanation:

Disulfide bonds contribute to tertiary and quaternary protein structures. Breaking them can change these structures. Secondary structure is due to hydrogen - bonding, and primary structure is the amino - acid sequence which is not affected by these chemicals that break disulfide bonds. Since it's a single polypeptide chain, quaternary structure (inter - polypeptide chain interactions) is not applicable here, but tertiary structure (3 - D shape within a single chain) can be affected.

Answer:

C. tertiary structure