Which is not present in an α-helix?
Correct answer: B. Disulphide linkage
- A. H-Bond
- B. Disulphide linkage
- C. Covalent bond
- D. Amino acids
Explanation
Disulfide linkages are not typically found within α-helices. They form between cysteine residues in proteins, stabilizing tertiary protein structure.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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