Q2-19. Noncovalent bonds specify the shape of macromolecules. Hydrogen bonds, Electrostatic attractions, Van Der Waals attractions, and hydrophobic interactions
Q2-20. Amphipathic molecules are molecules that have both hydrophobic and hydrophilic parts. The hydrophilic ends like water, so they tend to hydrogen-bond to the water molecules. The hydrophobic ends do not like water, so they tend to stay away from the water molecules and expose themselves