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Peptides and Proteins

Protein's structures

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Which of the following statements are correct regarding the protein structures?

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A primary structure is a sequence of amino acid residues joined by a series of ionic bonds.

The two types of secondary structure are sulfide bridges and hydrophobic cores.

Non-local interactions between the R groups in the amino acid residues form a tertiary structure.

A quaternary structure is formed by several folded polypeptide chains.

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