Which one of the following statements is TRUE regarding the nitrogen cycle?
A) Nitrogen fixation results in the production of nitrogen from carbon.
B) Atmospheric nitrogen is unavailable to living organisms because two nitrogen atoms are held tightly together by a triple covalent bond.
C) Plants take up ammonia directly from the atmosphere.
D) Once nitrogen is "fixed," it must then be converted to nitrogen gas before living organisms can use it.
E) In a balanced ecosystem, nitrogen fixation occurs more often than denitrification.
B
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There are different shuttle systems to get high energy electrons from the NADH in the cytoplasm to
the NADH in the mitochondria. Why is this beneficial?
a. This allows for 100% efficiency in cellular respiration. b. Each step of cellular respiration can happen faster. c. It allows for regulation of ATP production by individual cells. d. It diverts more electrons to ATP synthase to produce more ATP. e. This is actually a detrimental event that the cell must overcome.
Which is the dominant greenhouse gas leading to global warming?
A) CH4 B) H2O C) NO2 D) CO2
What does the Murphree Water Treatment Plant use to disinfect the water?
A- nitrogen B- Oxygen C- Phosphorus D- Iodine E- Chlorine
Thigmotropism
What will be an ideal response?