Answer:
D. Tertiary
Explanation:
Polypeptide chains with 3D structure represents tertiary structure of proteins. side chain interacts to form tertiary structure or the side chain interaction with the polypeptide backbone result in the formation of tertiary structure. Four weak forces contribute to make the tertiary structure stable. Hydrophobic interaction plays a key role in this structure, chain contains both resides; hydrophobic as well as hydrophilic too. More hydrophobic residues in the polypeptide chain of protein let the protein to be surrounded by more neighboring parts. Other forces include ionic bonds, hydrogen bonds, and Van der Waals forces, all these forces make interaction that impact in stability of protein structure.
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Aerobic because it produces up to 38 ATP versus anaerobic which only produces 2 ATP