OCR Biology 'Proteins and Amino acids' 5.0 / 5 based on 1 rating ? BiologyBiological moleculesBiological molecules, organic chemistry and biochemistryASOCR Created by: BethanyMCreated on: 04-10-15 17:36 How is a peptide bond formed? Two amino acids are joined by a condensation reaction 1 of 16 What do amino acids contain? Carbon, hydrogen, oxygen, nitrogen (+ sulphur) 2 of 16 What is the formula of the amino group? NH-2 3 of 16 What is the formula of the acid group? COOH 4 of 16 Is the amino group acidic or basic? Acidic 5 of 16 Is the acid group acidic or basic? Basic 6 of 16 What bond is formed when amino acids join together by condensation? A covalent peptide bond 7 of 16 What is a polypeptide? A larger structure consisting of multiple amino acids 8 of 16 What is a protein? Something made of amino acids which has a distinct biological function 9 of 16 The function of a protein is determined by its _______ structure Primary 10 of 16 Which bonds hold the alpha helix together? Hydrogen bonds between the -NH and -CO groups 11 of 16 When one chain folds over on itself, this produces a __________ Beta-pleated sheet 12 of 16 An enzyme is an example of a _______ structure Tertiary 13 of 16 A quaternary structure is made up of ________ polypeptide chain More than one 14 of 16 Fibrous proteins are long chains of amino acids which are generally insoluble and inelastic. How is this beneficial for collagen? Inelasticity allows muscles to contract. Long chains provide mechanical strength. 15 of 16 Keratin contains many _______ between polypeptide chains adding strength. Disulphide bridges 16 of 16
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