1.               True or False: The amino acids lysine and arginine both contain sulfur atoms.

2.               True or False: The following secondary structure shown below is an example of a beta-turn

3.               True or False. The side chain of histidine is bonded to the backbone nitrogen atom.

4.               True or False: The name of the molecule that binds to an enzyme is called the ligand.:

5.               True or False: An inhibitor that binds at the active site is a coenzyme.: False 6. Which amino acids both have an R group (side chain) with an -OH functional group?

7.  The formation of a peptide bond between two amino acids is an example of a(n) _____ reaction.:

8.  The peptide Ala-Glu-Gly-Ala-Leu has ______ .

9.  Formally, when there are 100 or more amino acids are

covalently linked together that is called a _________.

10. What unit is used by biochemists to indicate the mass of a protein?:

11. All of the 20 standard amino acids contain an R-group that is attached to the: A) ±carbon 

B)   Carboxyl group

C)   Amino group

D)   ² carbon

E)   None of the above:

12.  Which of the following correctly matches the amino acid with its one letter abbreviation?:

13.  The order of amino acids in a protein is written _________.

14.  Roughly how many amino acids are there in one turn of an alpha helix?

15.  15. In an alpha helix, the R groups on the amino acid residues::

16.  Motifs are classified primarily by their:

17.  The secondary structure shown below is an example of a(n):

18.  The overall three-dimensional shape of a single folded polypeptide is 

________ structure.

19.  How many classes of enzymes are recognized by the IUBMB?: 6

20.  An enzyme requires Cr+3 for catalysis. When the enzyme contains the Cr3+ it called a/an _________.

21.  When a substrate has just started its conversion to a new molecule, it is said to be in the ________.

22.  Which of the following would change the rate of an enzymecatalyzed reaction?

23.  Which of the following describes induced fit?:

24.   The ES stands for:

25.  An organic molecule that is necessary for an enzyme's function is called a:

26.  Consider the following protein structure.

A)              Is the protein globular or fibrous? Explain your response in at least one complete sentence giving at least one (1) piece of evidence in your response.

B)              Identify at least two (2) types of secondary structure present in the following protein.:

27.  (short response) Staphylokinase is said to be a dimer. A) What is a dimer? B) Structurally, a dimer describes what level of protein organization?:

28. (short response) One protein has a stable structure known as a"helix-turn-helix" arrangement. What is the term that describes these stable collections of protein structure and where do they fit in protein structure levels?: (Short response) A. Define the primary level of protein structure. B) How do scientists communicate the primary sequence?:

29.           Define the term "active site.":