Organic Chemistry III

Professor Carl C. Wamser

Chapter 25 Pre-Quiz

(must be done in WebCT before Fri., May 7, 8:30 am)

1. Galactose is

a. an aldopentose  
* b. an aldohexose  
c. a ketopentose  
d. a ketohexose  
e. none of the above

2. Glucose has ___ stereocenters and is therefore one of ___ stereoisomers.

a. 2 , 4  
b. 3 , 8  
c. 4 , 8  
* d. 4 , 16  
e. none of the above

3. Beta-D-glucopyranose has how many equatorial substituents (not counting hydrogen as a substituent)?

a. 2  
b. 3  
c. 4  
* d. 5  
e. 6

4. Benedict's solution converts an aldose into

a. a uronic acid  
b. an aldonic acid  
* c. an aldaric acid  
d. a ketose  
e. an alditol

5. One of the disaccharides that can be made from two units of glucose is

a. sucrose  
b. lactose  
* c. cellobiose  
d. cellulose  
e. ribose