Chem 336 - Spring 2002
Organic Chemistry III
Dr. Carl C. Wamser
In order to do this pre-quiz, you must log in to the class WebCT site.
This pre-quiz must be submitted via WebCT before Wednesday morning, May 29, 8:30 am.
1. How many different tripeptides could be made from one equivalent each of Ala, Leu and Val?
1) 3
* 2) 6
3) 9
4) 12
5) 27
2. At pH 11, His would be expected to have a charge of
1) 0
2) +1
3) +2
* 4) -1
5) -2
3. The most basic of the amino acids is
* 1) Arg
2) His
3) Lys
4) Tyr
5) Trp
4. Electrophoresis is a method of separating amino acids based on their
1) molecular weight
2) polarity
3) H-bonding
* 4) charge
5) density
5. Approximately 30% of the bases in human DNA are adenine. Based on this you can calculate that the percentage of guanine is
1) 15%
* 2) 20%
3) 25%
4) 30%
5) more than 30%