Chem 336 - Spring 1999 - Organic Chemistry III
Portland State University - Dr. Carl C. Wamser

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Chapter 27 Pre-Quiz

(1 point each)

1. The amino acid with the most basic side chain is

a) Asn

b) Arg

c) His

d) Lys

e) Trp

2. At pH 7, lysine would be expected to have a net charge of

a) -2

b) -1

c) 0

d) +1

e) +2

3. The alpha-helix is an example of

a) primary structure

b) secondary structure

c) tertiary structure

d) quaternary structure

e) none of the above

4. A tripeptide is completely hydrolyzed to give Ala, Gly, and Val. How many possible tripeptides could give this result?

a) 3

b) 6

c) 8

d) 9

e) 12

5. Using only Ala, Gly, and Val, how many different tripeptides could you make, allowing for use of any of those amino acids more than once?

a) 6

b) 8

c) 9

d) 12

e) 27