Biology 525 Midterm 3 Fall 2017 Leasure Multiple Choice (3pts each) 1. What (or who) are the two major producers of fixed Nitrogen (ie.. NH’ or NO;) in the world? A. Lightning and Bacteria B. Bacteria and Fungus C. Humans and Bacteria D. Fungus and Plants 2. Which form of fixed nitrogen is used by plants to build amino acids and other nitrogen- containing compounds? A. NO B. NO C. NO, D. NH 3. What two enzymes are used to convert NO, to NH A. Nitrate Reductase and Glutamine Synthetase B. Glutamine Synthetase and GOGAT C. Nitrate Reductase and Nitrine Reductase D. Aspartate Aminotransferase and Asparagine Synthetase 4、(True or False) NH,’ is more toxic to plants than NO A. True B. False 5. Where does the a-Ketoglutarate used by the Glutamine Oxoglutarate Aminotransferase (GOGAT) enzyme come from? A. Pentose Phosphate. B. The Citric Acid Cycle (a.k.a. TCA: Kreb’s). C. Glycolysis. D. The Calvin Cycle.