BRAINCAKEGlobular and Fibrous Proteins
Proteins perform many different functions in the cell.
Their roles depend on their shape and structure.
Their molecular shapes can be one of two different types:
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Key terms in this lesson
- 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.
- haemoglobin
- A globular, quaternary protein in red blood cells, made of four polypeptide chains each with a haem group, that binds and transports oxygen.
More in Biological Molecules
- Amino-Acids
- Peptide Bond Formation
- Primary Structure
- Secondary Structure
- Tertiary Structure
- Quaternary Structure
- Test for Proteins
- Collagen
All 29 lessons in Biological Molecules · All AQA AS-level Biology topics