A-LevelBiologyBiological molecules9700/12 · May/June 2025 · Q111 Mark
Which bonds are found in the levels of structure of a protein molecule?
Aprimary structure: covalent bond, secondary structure: hydrogen bond, quaternary structure: peptide bond
Bprimary structure: covalent bond, secondary structure: ionic bond, quaternary structure: disulfide bond
Cprimary structure: peptide bond, secondary structure: hydrogen bond, quaternary structure: ionic bond
Dprimary structure: peptide bond, secondary structure: ionic bond, quaternary structure: disulfide bond
✓ Correct answer
C: primary structure: peptide bond, secondary structure: hydrogen bond, quaternary structure: ionic bond
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