pour

Pour 100 ml of solution in step 3 into the onion chopped onions that have been in the blender. Liquid detergents cause cell membranes to break down and dissolve lipids and proteins from cells by damaging the bonds that bind the cell membranes together. Detergents serve to precipitate lipids and proteins from the solution. Table salt (NaCl) allows nucleic acids to precipitate from an ethanol solution because it protects the negative end of phosphate from DNA, causing the DNA strand to come closer together and fused.