The stability in the following structure is due to the:
Correct answer: D. Hydrogen bonding between NH group of one peptide and CO group of another peptide.
- A. Disulphide bridges
- B. Weak Van Der Waal's forces
- C. Presence of unpaired electron in the structure.
- D. Hydrogen bonding between NH group of one peptide and CO group of another peptide.
Explanation
Residue in the given structure of alpha helix is due to the hydrogen bonding between the NH group of one peptide and carbonyl (C=O) of another peptide residue
This question appeared on the UHS MDCAT 2018 paper, which you can sit online with every answer explained.
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About Classification of Proteins
Proteins are classified by composition as simple, conjugated and derived proteins, and by shape as fibrous or globular proteins. The topic relates these classes to examples such as albumin, keratin, collagen, haemoglobin and casein, while distinguishing structural proteins from proteins with transport, catalytic or regulatory roles.
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