1. a.  Draw an amino acid:
 
 
 

   b. List the three general types or classifications of "R" groups and give an example of each:
  
   1.
 
   2.

   3.
 

2. If a solute molecule takes 10 msec to diffuse 10 mm, how long would it take this solute to diffuse 1 mm?
 
 
 
 

3. Draw a glucose molecule as it appears in solution:
 
 
 
 
 

4. Consider the following reaction: 

Glucose + ATP  --->  Glucose-6-phosphate + ADP

    What is the sign of DG?  Explain your answer.