Question

which level of protein organization is least likely to be interrupted by an increase in temperature or ph? quaternary secondary tertiary primary

Explanation:

Protein primary structure is the sequence of amino acids linked by peptide bonds. Peptide bonds are relatively stable to temperature and pH changes compared to the non - covalent bonds (like hydrogen bonds, hydrophobic interactions) that stabilize secondary, tertiary, and quaternary structures. Secondary structure (e.g., alpha - helices, beta - sheets) is stabilized by hydrogen bonds, tertiary by various non - covalent interactions, and quaternary by interactions between multiple polypeptide chains. These non - covalent bonds are more likely to be disrupted by temperature or pH changes. So the primary structure is least likely to be interrupted.

Answer:

primary (the option corresponding to "primary")