Problem Set: And now a message from our sponsor.

A. List three different ways (i.e. general mechanisms) in which a receptor protein can generate second messengers in the cell?

B. Name two different examples of enzymes stimulated by a G protein, and list the second messengers the enzymes produce.

C. Name two types of local secondary structure in protein.

D. Name three types of post-translational modifications that can happen to proteins.

Problem Set: Did I tell you I just got a Golden Lab?

A. If you take a sample of Red Blood Cells placed in distilled water, and try to look at the sample in the microscope, you will likely see nothing. Why?

B. Which will sediment smaller organelles? - A centrifugation at 3000 g for 5 hours, or one for 10,000 g for 1 hour? Why?

C. Which will sediment smaller organelles (assuming you are using the same rotor)? - A centrifugation at 2000 rpm for 5 hours, or one for 10,000 rpm for 1 hour? Why?

D. List two advantages of fluorescent microscopy optics over brightfield microscope optics.

E. List two enzymes that use ATP as a substrate.