Organic Chemistry III
	Professor Carl C. Wamser
Chem 336 - Spring 2007	Pre-Quiz 28

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

1. Caffeine is an example of

a. a nucleic acid  
b. a pyrimidine  
* c. a purine  
d. a nucleoside  
e. a nucleotide

2. The messenger RNA codon GAC codes for which amino acid?

a. Leu  
b. Ala  
* c. Asp  
d. Asn  
e. Gly

3. DNA that was found to contain 26% A could be calculated to contain

a. 26% G  
* b. 24% G  
c. 26% U  
d. 26% C  
e. 74% T

4. At pH 7, hydrolysis of ATP to ADP is

* a. exergonic by 31 kJ/mol  
b. endergonic by 31 kJ/mol  
c. exergonic by 14 kJ/mol  
d. endergonic by 14 kJ/mol

5. Nucleosomes consist of

a. ribosomes plus DNA  
* b. histones plus DNA  
c. DNA + RNA  
d. polymerase chain reaction