Biology Unit 1 - Proteins 2.0 / 5 based on 1 rating ? BiologyASAQA Created by: Hannah SmithCreated on: 07-05-13 18:43 What are proteins made from? One or more polypeptides. (amino acid chains) 1 of 9 How are polypeptides formed? They are formed by condensation reactions, where peptide bonds are formed between amino acids. 2 of 9 What is the primary structure of a protein? The sequence of amino acids in a polypeptide chain. 3 of 9 What it the secondary structure of a protein? Hydrogen bonds form between amino acids, and the chain either coils into an alpha helix or folds into a beta pleated sheet. 4 of 9 What is the tertiary structure of a protein? More hydrogen bonds form in addition to disulfate bridges between parts of the polypeptide chain, causing it to coil and fold more. 5 of 9 What is the quaternary structure of a protein? This is the way multiple polypeptide chains are assembled together to form a protein. 6 of 9 Name some functions of proteins. Enzymes, antibodies, transport proteins, structural proteins. 7 of 9 What test do you use for proteins? The biuret test. 8 of 9 What results would you expect from the biuret test if proteins are present? The solution will turn purple. 9 of 9
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