Amino Acid Self Quiz

Match the amino acid to its correct amino acid family.

1.     Arginine                        a. 3-Phosphoglycerate

2.      Glycine                        b. Oxaloacetate

3.     Tryptophan                   c. α-ketoglutarate

4.     Alanine                         d. Phosphoenolpyruvate

5.     Threonin                       e. Pyruvate

6.     Glutamine is essential for cells because it:

a.     Incorporates oxygen into hemoglobin

b.     Allows the synthesis of ATP

c.     Incorporates inorganic nitrogen into cell material

d.     Allows the cell to cycle and excrete oxygen radicals

7.     Valine shares the same four enzymes at the end of its’ synthesis with:

a.     Methionine

b.     Leucine

c.     Isoleucine

d.     Glycine

8.      Which characteristic of leucine allows it to modulate the passage of ion through bacterial membranes and pores?

a.     Chirality on side chain

b.     Size of side chain

c.     Hydrophilic side chain

d.     Hydrophobic side chain

9.     During phenylalanine biosynthesis, what is the importance of the enzyme chorismate mutase?

a.     Hydrolysis of chorismate

b.     Catalyze a Claisen rearrangement of chorismate to form prephenate

c.     Decarboxylation of prephenate to phenylpyruvate

d.     Transamination of phenylpyruvate

10.  Which amino acid is converted into catecholmines used in the nervous system?

a.     Tryptophan

b.     Valine

c.     Tyrosine

d.     Isoleucine

11.  What additional molecule is needed in the synthesis of isoleucine in the asetolactate synthase step?

a.     Acetyl CoA

b.     Pyruvate

c.     ATP

d.     Glutamate

12.  What are the two compounds that can be interconverted with glutamate (via one conversion reaction)?

a.     Glutamine, oxaloacetate

b.     Glutamine, α-ketoglutarate

c.     Aspargine, α-ketoglutarate

d.     Aspargine, oxaloacetate

e.     None of the above

13.  Asparagine is used to:

a.     Link oligosaccharides to final protein acceptors

b.     Synthesize N-acetyl glucosamine

c.     Assimilate nitrogen

d.     Counteract free radical damage

14.  Histidine plays a physiological role in which of the following activities:

a.     Catalytic triads

b.     Proton shuffle

c.     Histidine kinases

d.     All of the above

15.  Serine is a precusor for:

a.     Glycine

b.     Cysteine

c.     Phenylalanine

d.     A and B

e.     All of the above

 16.  Cysteine is important in protein stability.

a.     True

b.     False

17.   Asp13 is the location of phosphorylation in the CheY protein in bacteria chemotaxis.

a.     True

b.     False

18.  Due to its rigidity and small loss in conformational entropy upon exposure to high temperatures, proline tends to be more abundant in thermophilic organisms.

a.     True

b.     False

19.  Methionine is in a derivative form in bacteria, called fMet, to initiate translation.

a.     True

b.     False

20.  The one letter abbreviation for Lysine is L.

a.     True

b.     False