Explain buffer and give example Explain polymer and give example If you have 5-amine-modified DNA and thiol DNA how do you attach them to surface? What is the chemistry? What do you prepare 1mM solution with 1mg sample and 1.5mL tubes ? How do you make 1nM from 1mM? If you have hydrophilic and hydrophobic surfaces, and lipid solution how do you know which surface is which ?what tool do you need? If you have lipid in aqueous buffer, if you want to make lipid bilayers on surface, do you need hydrophobic or hydrophilic surface?