A-LEVEL Exam A-LEVEL Biology
                    
                        3.1.2 Carbohydrates
                    
                                    
                
                    
                        3.1.4.1 General properties of proteins
                    
                                    
                
                    
                        3.1.4.2 Many proteins are enzymes
                    
                                    
                
                    
                        3.1.6 ATP
                    
                                    
                
                    
                        3.1.7  Water
                    
                                    
                
                    
                        3.1.8 Inorganic ions
                    
                                    
                