Lab #4 - Testing for Macromolecules

The dissolved coffee in hot water can be separated by which technique? a. using a magnet b. evaporating the water c. filtering the solution d. decanting the solution

These modify the interfacial properties of substances. A. Surfactants B. Aerosols C. Nanotechnology D. Suspensio

7. Protein Gel Running Buffer is made and kept at 12X concentration for storage. You will need 0.55 L of this solution at a concentration of 1X to run your gels. How would you make this solution?

The phrase "like dissolves like" refers to the fact that ____________. a. Polar solvents dissolve nonpolar solutes and vice versa b. Sovents can only dissolve solutes of similar molar mass c. Gases can only dissolve other gases d. Polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes  e. condensed phases can only dissolve other condensed phases

How many milliliters of a 17% w/v concentrate of benzalkonium chloride should be used in preparing 150 mL of a stock solution such that 15 mL. diluted to 1 liter will yield a 1:5000 solution? A. 2 ml. B. 23.5 mL C. 11.75 ml. D. 0.2 mL

23. A researcher wanted to use myoglobin as a substitute for hemoglobin to carry oxygen in a human body. Would this be successful? Why or why not? Use the graph below to help you answer your question. Fractional Saturation D.B 0.6 0.4 0.2 Mb 20 40 Hb 60 po, (tor) 80 100 3

4. Calcium Hydroxide Solution (Lime Water) and olive oil are used because an emulsifying agent is formed in situ when these 2 solutions are agitated together. What is the emulsifying agent that is formed? a. calcium succinate b. calcium oleate c. succinic hydroxide d. palmitic hydroxide