Name:______________________________________                                                                                                                     Sample Exam

HORT 5133 - Temperature Stress Physiology

I. Briefly define the following terms, then give an example from everyday life that illustrates the concept or principle (10 points each):

    A. Entropy-

    B. Radiation-

II. Answer the following questions. Use the back of the page if you need more room for your answer, labeling each answer with the number corresponding to the question. Point values are in parentheses.

1. Describe what will happen to a polypeptide undergoing translation that contains a signal sequence and a vacuolar sorting signal. Be sure to include discussion of interactions with other molecules and structures on the path to becoming a functional protein. (34 points)

2. Assume you are engineering two novel proteins to be expressed in a plant. One protein must be short-lived and the other must have a long lifetime. What steps would you take to adjust the proteins’ lifetimes? (22 points)

3. What free energy-related term provides information on the rate of a chemical reaction? What is the physical basis for this term? (24 points)