4.
									
										Which of the following statements about membrane fluidity is correct?
									
								
															
														
																									
										A:
											Membrane fluidity is increased when there is a high proportion of trans unsaturated fatty acids in the glycerophosphate molecules that make up the bilayer.
									
																										
										B:
											 Membrane fluidity is decreased when there is a high proportion of cis unsaturated fatty acids in the glycerophosphate molecules that make up the bilayer. 
									
																										
										C:
											 Membrane fluidity is increased when there is a high proportion of cis unsaturated fatty acids in the glycerophosphate molecules that make up the bilayer. 
									
																										
										D:
											 Membrane fluidity is increased when there is a high proportion of saturated fatty acids in the glycerophosphate molecules that make up the bilayer.
									
																								 
							
																
									The answer is:
										C
									
								
														
							
								
								
							
							
							
								