BRAINCAKETertiary Structure
The tertiary structure of a polypeptide involves is further coiling and folding to give a specific 3D structure due to covalent bonds such as disulfide bridges, ionic bonds and hydrogen bonds between the R-groups.
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Key terms in this lesson
- covalent bond
- A strong chemical bond formed when a pair of electrons is shared between two atoms.
- ionic bond
- A strong bond formed by the electrostatic attraction between oppositely charged ions.
- hydrogen bond
- A weak electrostatic attraction between a slightly positive hydrogen atom on one polar molecule and a slightly negative atom, such as oxygen or nitrogen, on another.
More in Biological Molecules
- Amino-Acids
- Peptide Bond Formation
- Primary Structure
- Secondary Structure
- Quaternary Structure
- Test for Proteins
- Globular and Fibrous Proteins
- Collagen
All 29 lessons in Biological Molecules · All AQA AS-level Biology topics