25.
									
										A microfibril of cellulose is composed of about 80 molecules that lie parallel to each other and close together. What type of bond holds the parallel fibers together?
									
								
															
														
																									
										A:
											Vanderwaal forces
									
																										
										B:
											 Hydrophobic interactions 
									
																										
										C:
											Ionic interactions 
									
																										
										D:
											Hydrogen bonds
									
																								 
							
																
									The answer is:
										D