12.
									
										Which crucial enzyme in the slavage pathway of purine nucleotides result in a genetic disorder called Lesch-Nyhan Syndrome;
									
								
															
														
																									
										A:
											Adenosine-guanosine phosphoribosyl transferase
									
																										
										B:
											 Hyopxanthine-guanine phosphoribosyl transferase 
									
																										
										C:
											Xanthosine-guanosine phosphoribosyl transferase 
									
																										
										D:
											Hyopxanthine-guanosine phosphoribosyl transferase
									
																								 
							
																
									The answer is:
										B