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Proteins (Enzymes (Factors affecting the rate of enzyme controlled…
Proteins
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Biuret Test
- Place sample in a test tube
- Add an equal volume of sodium hydroxide
- Add a few drops of dilute copper (II) sulfate solution
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- If it contains peptide bonds (and therefore proteins) the colour will change from blue to purple
Structure
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Secondary Structure
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Hydrogen in -NH has slight positive charge, oxygen in -CO has slight negative charge
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Quaternary Structure
Large proteins forming complex molecules, often made up of multiple polypeptide chains that are linked in various ways
Amino acids
Proteins are made up of the monomer amino acid, which join together to form polymers (proteins)
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