Organic Chemistry III
	Professor Carl C. Wamser
Chem 336 - Spring 2007	Pre-Quiz 25

(must be done in WebCT before Fri., May 4, 8:30 am)

1. D-Ribulose is

a. an aldotetrose  
b. an aldopentose  
c. an aldohexose  
d. a ketotetrose  
* e. a ketopentose  
f. a ketohexose

2. The C-2 epimer of D-glucose is

a. D-fructose  
b. L-glucose  
c. D-ribose  
* d. D-mannose  
e. D-arabinose

3. The stereochemstry of D-2-deoxyribose is

a. 3R,4R  
b. 3R,4S  
* c. 3S,4R  
d. 3S,4S

4. Mutarotation of glucose interconverts

a. conformations  
b. enantiomers  
* c. diastereomers

5. In beta-D-ribopyranose, which carbon atoms are joined by the oxygen atom in the ring?

a. 1&6  
* b. 1&5  
c. 1&4  
d. 2&6  
e. 2&5