Proteins are polymers of amino acids linked by peptide bonds through condensation, exhibiting primary (amino acid sequence), secondary (polypeptide folding via H-bonds), tertiary (3D structure via various bonds), and quaternary (multiple subunit assembly) structures.
Proteins are polymers of amino acids joined by peptide bonds via condensation. They have primary (sequence), secondary (folding via H-bonds, e.g., helix/sheet), tertiary (3D folding via H, ionic, disulfide bonds), and sometimes quaternary (multiple chains) structures.
| Front | Describe the structure of proteins. (5 marks) |
|---|---|
| Back | 1. Polymer of amino acids; 2. Joined by peptide bonds; 3. Formed by condensation; 4. Primary structure is order of amino acids; 5. Secondary structure is folding of polypeptide chain due to hydrogen bonding; Accept alpha helix / pleated sheet 6. Tertiary structure is 3-D folding due to hydrogen bonding and ionic / disulfide bonds; 7. Quaternary structure is two or more polypeptide chains. |
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