The enzyme _____________ reduces atmospheric nitrogen to ___________. nitrate reductase; ammonia nitrite reductase; nitrate nitrogenase; ammonia...
The enzyme _____________ reduces atmospheric nitrogen to ___________.
nitrate reductase; ammonia
nitrite reductase; nitrate
nitrogenase; ammonia
nitrate oxygenase; nitrite
Homework Answers
The enzyme nitrogenase reduces atmospheric nitrogen to ammonia
-Nitrogenase are enzymes that are produced by certain bacteria, such as cyanobacteria. These enzyme are responsible for the reduction of nitrogen to ammonia. Nitrogenase are the only family of enzymes known to catalyze this reaction.
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The enzyme _____________ reduces atmospheric nitrogen to
___________.
nitrate reductase; ammonia
nitrite reductase; nitrate
nitrogenase; ammonia...
• Nitrogenase, the enzyme responsible of nitrogen fixation (conversion of the atmospheric gas N2 into ammonia...
• Nitrogenase, the enzyme responsible of nitrogen fixation (conversion of the atmospheric gas N2 into ammonia NH3) is inactivated by oxygen. Explain which adaptations in bacteria make it possible to carry on both the process of oxygenic photosynthesis and nitrogen fixation
how are the enzymes nitrate reductase and nitrite reductase being made available to the nitrogen substrate...
how are the enzymes nitrate reductase and nitrite reductase being made available to the nitrogen substrate in root and leaf tissues?
The enzyme that converts atmospheric nitrogen to ammonia in the nodules of the rhizobium/plant symbiosis is...
The enzyme that converts atmospheric nitrogen to ammonia in the nodules of the rhizobium/plant symbiosis is The greatest source for fixing molecular nitrogen (N_2) to ammonium (NH_4^+) in terrestrial environments is Why is NH_4^+ toxic to all organisms if allowed to accumulate beyond -0.5 mM? The statement above is false - NH_4^+ is not toxic but is instead an important source of nitrogen. NH_4^+ reacts with NADPH (and NADH) to reduce the reducing power in a cell. At pH 7...
Test interpretation: A. Addition of reagents A and B: color changed to redà nitrate reductase- positive...
Test interpretation:
A. Addition of reagents A and B: color changed to redà nitrate
reductase- positive (nitrate reducer). If this is the case, you are
done, do not add zinc powder.
B. Addition of reagents A and B: no color changeà it could be:
(a) nitrate reductase-negative (non-reducer) or (b) nitrate
reductase-positive (super reducer). ADD ZINC POWDER TO THE BROTH to
distinguish between these two possibilities.
1. If red color formsà nitrate is still present in the broth:
non- reducer....
Most plants can absorb and use which of the following forms of nitrogen directly? A) nitrite...
Most plants can absorb and use which of the following forms of nitrogen directly? A) nitrite and nitrate B) nitrate only C) ammonium and nitrogen gas D) nitrate and ammonium Nitrogen fixation consists of A) the conversion of ammonia to nitrate. B) the production of ammonium from decomposing organic matter. C) the conversion of N2 to ammonia. D) the conversion of N2 to ammonia or nitrate.
For biosynthesis of amino acids, NH3 is necessary. NH3 is prepared from N2 gas through a...
For biosynthesis of amino acids, NH3 is necessary. NH3 is prepared from N2 gas through a nitrogen-fixation process, which is catalyzed by the _______. This enzyme has a unique _______ reaction center. Select one: a. nitrogenase : Fe-S b. nitrate reductase : Fe-S c. nitrate reductase : Mo-Fe d. nitrogenase : Mo-Fe
Some bacteria can use nitrate as an electron acceptor instead of oxygen, reducing it to nitrite....
Some bacteria can use nitrate as an electron acceptor instead of oxygen, reducing it to nitrite. This requires an enzyme called nitrate reductase. Write a balanced equation for the oxidation of NADH by nitrate. Calculate the Gibbs free energy change under standard state conditions (ΔGo’) for the oxidation of NADH by nitrate [tip: you will need to look at Table 3.5 in the textbook]. The Faraday Constant, F, is 96.5 kJ/V.mol.
Measurement of nitrogen in water in the form of nitrite NO2- can be achieved by diazo...
Measurement of nitrogen in water in the form of nitrite NO2- can be achieved by diazo dye formation followed by measurement of absorbance at 543 nm. Measurement of nitrate nitrogen (NO3-)is achieved by reducing the nitrate to nitrite then determining total nitrite nitrogen, nitrate nitrogen is found by difference. The following calibration data were used in nitrate-and nitrite nitrogen determinations: mg nitrogen. L-1 as nitrite absorbance at 543nm 0.000 0.000 0.050 0.055 0.100 0.111 0.200 0.218 0.500 0.556 A undiluted...
For Tube A, B, C indentify if each tube are positive or negative for Nitrate reductase,...
For Tube A, B, C indentify if each tube are positive or negative
for Nitrate reductase, Nitrite reductase and Super
reducer.
Tube A - red
Tube b- clear with grey substance at the bottom of tube.
Tube C- red with grey substance at bottom if tube
4 ОС 4 BE
Design a detailed, step-by-step, experiment to a) Detect the presence of Nitrate reductase gene in your...
Design a detailed, step-by-step, experiment to a) Detect the presence of Nitrate reductase gene in your unknown bacterial sample b) Detect the presence of Nitrate reductase enzyme in your unknown bacterial sample
The enzyme that converts atmospheric nitrogen to ammonia in the nodules of the rhizobium/plant symbiosis is The greatest source for fixing molecular nitrogen (N_2) to ammonium (NH_4^+) in terrestrial environments is Why is NH_4^+ toxic to all organisms if allowed to accumulate beyond -0.5 mM? The statement above is false - NH_4^+ is not toxic but is instead an important source of nitrogen. NH_4^+ reacts with NADPH (and NADH) to reduce the reducing power in a cell. At pH 7...
Test interpretation:
A. Addition of reagents A and B: color changed to redà nitrate
reductase- positive (nitrate reducer). If this is the case, you are
done, do not add zinc powder.
B. Addition of reagents A and B: no color changeà it could be:
(a) nitrate reductase-negative (non-reducer) or (b) nitrate
reductase-positive (super reducer). ADD ZINC POWDER TO THE BROTH to
distinguish between these two possibilities.
1. If red color formsà nitrate is still present in the broth:
non- reducer....
For Tube A, B, C indentify if each tube are positive or negative
for Nitrate reductase, Nitrite reductase and Super
reducer.
Tube A - red
Tube b- clear with grey substance at the bottom of tube.
Tube C- red with grey substance at bottom if tube
4 ОС 4 BE
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