Some regions of a polypeptide may coil or fold back on themselves. This folding is called __________, and the coils or folds are held in place by __________.

Question

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tertiary structure, covalent bonds
secondary structure, peptide bonds
secondary structure, hydrogen bonds
tertiary structure, hydrogen bonds
primary structure, covalent bonds

Answer 1

The correct completion for the statement is:

This folding is called tertiary structure, and the coils or folds are held in place by hydrogen bonds.

So the complete statement would be: "Some regions of a polypeptide may coil or fold back on themselves. This folding is called tertiary structure, and the coils or folds are held in place by hydrogen bonds."