Organic Chemistry III
	Professor Carl C. Wamser
Chem 336 - Spring 2007	Pre-Quiz 27

(must be done in WebCT before Mon., May 21, 8:30 am)

1. The only functional group NOT found in the tripeptide SerLysPro is

a. amine  
b. amide  
c. carboxylic acid (or carboxylate)  
d. alcohol  
* e. ketone

2. At pH = 7, the expected net charge on the amino acid Lys would be

a. +2  
* b. +1  
c. 0  
d. -1  
e. -2

3. The compound below that does NOT represent an amine-protecting group is

* a. DCCI  
b. Boc  
c. Z  
d. FMOC

4. Sanger's reagent would label which amino acid in the tetrapeptide AlaArgThrIle ?

* a. Ala  
b. Arg  
c. Thr  
d. Ile  
e. all of the above  
f. none of the above

5. Chymotrypsin cleavage of the tetrapeptide PheValTrpLeu will give

a. two dipeptides  
b. a tripeptide and an amino acid  
* c. a dipeptide and two amino acids  
d. four amino acids  
e. no reaction