Nitrosomonas europaea uses the enzyme ammonia monooxygenase (AMO) and hydroxylamine oxidoreductase in nitrification reactions. Place the reaction steps in the proper order from first occuring to last result._____ NH3OH + H2O _____ NO2 + 5H+ + 4e- _____
NH3 + O2 + 2H+ + 2e-
Fill in the blank(s) with the appropriate word(s).
2, 3, 1
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What percentage of foods in supermarkets contains detectable amounts of ingredients found in pesticides?
a. 10 percent b. 20 percent c. 30 percent d. 40 percent e. 50 percent
At a minimum, primary producers require water, carbon dioxide, and light. These are things that are readily available in most ecosystems. However, we do not observe the same rates of net primary productivity in every region of the globe
Which of the following statements best reflects one reason why rates of productivity are not the same everywhere? A. Rates of net primary productivity are actually the same everywhere; scientists just need to calculate the rates relative to plant biomass in a given ecosystem. B. Although water is limited in certain ecosystems, nutrients that are scarce actually limit net primary productivity because they are necessary for growth. C. Although water is limited in certain ecosystems, irrigation would solve the problem and equalize rates of net primary productivity in every ecosystem. D. Rates of net primary productivity are actually limited by the amount of solar radiation. If net primary productivity were calculated as a yearly average, then this would show that ecosystems have the same rate of productivity.
A carbon atom with six protons, seven neutrons, and six electrons has a mass number of
a. 6. b. 7. c. 12. d. 13. e. 19.
What is the correct sequence of steps in the central dogma?
a. RNA->DNA->Protein b. RNA->Protein->DNA c. DNA->RNA->Protein d. DNA->Protein->RNA