Peptide bonds are important in protein because they:
Correct answer: C. Link amino acid
- A. Affect solubility
- B. Hold R-groups
- C. Link amino acid
- D. Help in releasing oxygen
Explanation
A peptide bond forms by condensation between the carboxyl group of one amino acid and the amino group of the next, so it is what creates the polypeptide chain and therefore the primary structure. R groups project from that backbone and determine folding, but the bond itself does not hold them. Oxygen release is a function of haemoglobin's haem group rather than of any peptide bond.
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About Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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