Proteins 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: mozzarellieCreated on: 13-04-18 19:13 How many diferent amino acids are there? 500 1 of 25 Out of 500 amino acids, how many are found in human proteins? 20 2 of 25 What is an amino acid made up of? Amino group, (NH2) Carboxyl group (-COOH), R Group 3 of 25 How are amino acids joined together? Peptide bond 4 of 25 What are proteins also known as? Polypeptides 5 of 25 What is teh primary structure of a protein? The sequence of amino acids 6 of 25 What is the secondary structure of a protein? Coiling/folding of the amino acid chain (alpha helix/beta pleated sheet/unstructured regions) 7 of 25 How is the secondary structure held together? Hydrogen bonds. 8 of 25 What is the tertiary structure of a protein? How the secondary structure folds to form the 3D shape 9 of 25 How many interactions does the tertiary structure involve? (including bonding) 4; Ionic bonds, disulphide bridges, hydrogen bonding, hydrophobic/hydrophilic interactions 10 of 25 What is the quaternary structure of a protein? How multiple polypeptide chains are arranged to make a protein. 11 of 25 What are the two main categories of proteins? Fibrous and globular 12 of 25 What is the primary structure of fibrous proteins? Regular and repetitive, extended 13 of 25 What is the primary structure of globular proteins? Random doesn't follow a strict pattern 14 of 25 What is the secondary structure of a fiberous protein? Relatively simple 15 of 25 What is the secondary structure of a globular protein? Complex 16 of 25 What makes fibrous proteins suitable for structural roles? Generally insoluble, less sensitive to pH and temperature changes. 17 of 25 What makes globular proteins suitable for metabolic roles? Soluble, more sensitive to changes in pH and temperature (allows reactions to be controlled) 18 of 25 What is an example of a fibrous protein being used? Collagen, in arteries, tendons, bones, cartilage 19 of 25 How many chains of polypeptides is haemoglobin made up of? 4 20 of 25 How many alpha and beta chains are in haemoglobin? 2 alpha, 2 beta 21 of 25 What else does haemoglobin contain? Haem groups 22 of 25 What do haem groups contain? Iron ions 23 of 25 What is the main function of haemoglobin? To transport oxygen from the lungs to the tissues 24 of 25 Where does oxygen bind to in a haemoglobin molecule? Haem group 25 of 25
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