Amino Acid Quiz Examples: Biochem 395 PDF

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Instructor: Dr. Potenza...

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BCHE 395: Some example questions for Amino acid Quiz 1. Write the name and one-letter code using the space provided for the amino acids shown. You should be able to do this for ALL 20 naturally occurring amino acids a.

Name

1-letter 3-letter

_________________ _____ ________ 2. Draw the structure of the amino acid corresponding to the following one-letter codes. (pH 7.4) You should be able to do this for ALL 20 naturally occurring amino acids given their full name, 3-letter and 1 letter codes at any given pH. a.

K

3. Indicate, in the form requested, ONLY ONE of the 20 common amino acids that corresponds to the description of its R-group. Note: there may be more than one correct answer, however only choose one. Questions describing the chemical and physical characteristics of the amino acids can be quite varied! a. Contains 2 chiral carbons

(3-letter code) ___________

b. Can be considered a H-bond DONOR

(1-letter code)___________

4. Draw the ionization equation for the amino acid glutamine. Draw complete structures for each form. Circle the form that predominates at pH 3.0 and calculate the pI. You should be able to do this for ALL of the 20 naturally occurring amino acids. This type of question has to do with your understanding of titration and pKs....