CHM

Which of the following best describes the side chain of valine?  
a.  acidic  
b. basic  
c. non-polar  
d. polar  



  Question 2      
   Which of the following amino acids has its isoelectric point at the lowest pH?  
a.  aspartic acid  
b. glycine  
c. arginine  
d. methionine  



  Question 3    
   When a disulfide linkage is formed, the compound containing the linkage has been  
a.  oxidized  
b. reduced  
c. hydrolyzed  
d. dehydrated  



  Question 4    
   How many different tripeptides could be made from serine, alanine, and glycine?  
a. 2  
b. 3  
c. 4  
d. 6  



  Question 5      
   The primary structure of a protein refers to  
a.  its amino acid sequence  
b.orientation of alpha-helices  
c.orientation of beta-pleated sheets  
d.presence of disulfide bonds  


Question six
Addition of alanine to water will produce  
a.  a neutral solution  
b.  a slightly basic solution  
c. a slightly acid solution  
d. cannot be predicted  



  Question 7    Multiple Choice  1 points    
   Which of the following fragments would NOT result when the decapeptide Asn-Gly-Lys-Phe-Pro-Arg-Gly-Leu-Lys-Ser is treated with trypsin?  
a. Gly-Leu-Lys  
b. Phe-Pro-Arg  
c. Asn-Gly-Lys  
d. Pro-Arg-Gly-Leu  



  Question 8    
   Which aldehyde would be used to prepare leucine using the Strecker synthesis?  
a. butanal  
b. 3-methylbutanal  
c. 2-methylbutanal  
d. 2-methylpropanal  



  Question 9  
   Amino acids have  
a. high melting points and low water solubility  
b.high melting points and large dipole moments  
c.small dipole moments and low water solubility  
d. large dipole moments and are hydrophobic  



  Question 10      
   The component of structure responsible for holding the 4 chains of hemoglobin together is  
a. primary  
b.secondary  
c.tertiary  
d.quarternary