Why must nitrogen fixation occur in an anoxic (i.e., oxygen-free) environment? a)Because H2 is an additional product of nitrogen fixation, and the combination of H2 and O2 would cause the cell to combust. b)Oxygen poisons the dinitrogenase enzyme by entering the FeMo cluster c)Oxygen competes as an electron acceptor in the ETC, so electrons cannot be passed to N2. d)Oxygen "steals" electrons from the dinitrogenase reductase, producing free radicals.
Why must nitrogen fixation occur in an anoxic (i.e., oxygen-free) environment? a)Because H2 is an additional product of nitrogen fixation, and the combination of H2 and O2 would cause the cell to combust. b)Oxygen poisons the dinitrogenase enzyme by entering the FeMo cluster c)Oxygen competes as an electron acceptor in the ETC, so electrons cannot be passed to N2. d)Oxygen "steals" electrons from the dinitrogenase reductase, producing free radicals.
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter4: How Cells Obtain Energy
Section: Chapter Questions
Problem 9RQ: What do the electrons added to NAD do? a. They become part of a fermentation pathway. b. They go to...
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Why must nitrogen fixation occur in an anoxic (i.e., oxygen-free) environment?
a)Because H2 is an additional product of nitrogen fixation, and the combination of H2 and O2 would cause the cell to combust.
b)Oxygen poisons the dinitrogenase enzyme by entering the FeMo cluster
c)Oxygen competes as an electron acceptor in the ETC, so electrons cannot be passed to N2.
d)Oxygen "steals" electrons from the dinitrogenase reductase, producing free radicals.
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