1. Nitrogen fixation represents a process by which atmospheric nitrogen is oxidized to make 2 ammonium ions.
True or False?

2. Amino acids are excellent examples of why life is dependent on a supply of nitrogen for anabolism.
True or False?

3. Alpha-ketoglutarate is the immediate precursor for which of these amino acids?
a.) A
b.) Q
c.) E
d.) R
e.) All of the above

4. Which of these is considered to be an essential amino acid?
a.) Trp
b.) Gln
c.) Ser
d.) Gly
e.) All of the above

5. Which statement about the Urea Cycle is correct?
a.) Is an important mechanism for removal of excess nitrogen
b.) Occurs exclusively in the cytosol
c.) Makes energy in the form of ATP
d.) Produces a glycolitic intermediate
e.) All of the above are correct