336768
What happens to ammonia formed by ammonification?
1 Some gets volatilized
2 Most of it gets converted into nitrate by soil bacteria
3 Some will undergo biological nitrogen fixation
4 Both (1) and (2)
Explanation:
Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria.
BIOXI12: MINERAL NUTRITION
336769
Identify the correct sequence with respect to nitrification.
Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. These nitrifying bacteria are chemoautotrophs. The nitrate thus formed is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids.
BIOXI12: MINERAL NUTRITION
336770
Crop rotation is used by farmers to increase
1 Soil fertility
2 Community area
3 Organic content of soil
4 Nitrogenous content in the soil
Explanation:
Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons.
BIOXI12: MINERAL NUTRITION
336771
\(\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}\) This reaction is catalyzed by the enzyme
1 Isomerase
2 Nitrogenase
3 Carbonic anhydrase
4 Higase
Explanation:
Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase is capable of nitrogen reduction and is present exclusively in prokaryotes. Such microbes are called \(\mathrm{N}_{2}\) fixers.
BIOXI12: MINERAL NUTRITION
336772
Statement A : The nitrate thus formed is absorbed by plants and is transported to the leaves. Statement B : Denitrification is carried by bacteria Nitrosomonas and/or Nitrococcus .
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Denitrification is carried by bacteria Pseudomonas and Thiobacillus.
336768
What happens to ammonia formed by ammonification?
1 Some gets volatilized
2 Most of it gets converted into nitrate by soil bacteria
3 Some will undergo biological nitrogen fixation
4 Both (1) and (2)
Explanation:
Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria.
BIOXI12: MINERAL NUTRITION
336769
Identify the correct sequence with respect to nitrification.
Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. These nitrifying bacteria are chemoautotrophs. The nitrate thus formed is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids.
BIOXI12: MINERAL NUTRITION
336770
Crop rotation is used by farmers to increase
1 Soil fertility
2 Community area
3 Organic content of soil
4 Nitrogenous content in the soil
Explanation:
Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons.
BIOXI12: MINERAL NUTRITION
336771
\(\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}\) This reaction is catalyzed by the enzyme
1 Isomerase
2 Nitrogenase
3 Carbonic anhydrase
4 Higase
Explanation:
Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase is capable of nitrogen reduction and is present exclusively in prokaryotes. Such microbes are called \(\mathrm{N}_{2}\) fixers.
BIOXI12: MINERAL NUTRITION
336772
Statement A : The nitrate thus formed is absorbed by plants and is transported to the leaves. Statement B : Denitrification is carried by bacteria Nitrosomonas and/or Nitrococcus .
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Denitrification is carried by bacteria Pseudomonas and Thiobacillus.
336768
What happens to ammonia formed by ammonification?
1 Some gets volatilized
2 Most of it gets converted into nitrate by soil bacteria
3 Some will undergo biological nitrogen fixation
4 Both (1) and (2)
Explanation:
Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria.
BIOXI12: MINERAL NUTRITION
336769
Identify the correct sequence with respect to nitrification.
Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. These nitrifying bacteria are chemoautotrophs. The nitrate thus formed is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids.
BIOXI12: MINERAL NUTRITION
336770
Crop rotation is used by farmers to increase
1 Soil fertility
2 Community area
3 Organic content of soil
4 Nitrogenous content in the soil
Explanation:
Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons.
BIOXI12: MINERAL NUTRITION
336771
\(\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}\) This reaction is catalyzed by the enzyme
1 Isomerase
2 Nitrogenase
3 Carbonic anhydrase
4 Higase
Explanation:
Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase is capable of nitrogen reduction and is present exclusively in prokaryotes. Such microbes are called \(\mathrm{N}_{2}\) fixers.
BIOXI12: MINERAL NUTRITION
336772
Statement A : The nitrate thus formed is absorbed by plants and is transported to the leaves. Statement B : Denitrification is carried by bacteria Nitrosomonas and/or Nitrococcus .
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Denitrification is carried by bacteria Pseudomonas and Thiobacillus.
336768
What happens to ammonia formed by ammonification?
1 Some gets volatilized
2 Most of it gets converted into nitrate by soil bacteria
3 Some will undergo biological nitrogen fixation
4 Both (1) and (2)
Explanation:
Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria.
BIOXI12: MINERAL NUTRITION
336769
Identify the correct sequence with respect to nitrification.
Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. These nitrifying bacteria are chemoautotrophs. The nitrate thus formed is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids.
BIOXI12: MINERAL NUTRITION
336770
Crop rotation is used by farmers to increase
1 Soil fertility
2 Community area
3 Organic content of soil
4 Nitrogenous content in the soil
Explanation:
Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons.
BIOXI12: MINERAL NUTRITION
336771
\(\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}\) This reaction is catalyzed by the enzyme
1 Isomerase
2 Nitrogenase
3 Carbonic anhydrase
4 Higase
Explanation:
Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase is capable of nitrogen reduction and is present exclusively in prokaryotes. Such microbes are called \(\mathrm{N}_{2}\) fixers.
BIOXI12: MINERAL NUTRITION
336772
Statement A : The nitrate thus formed is absorbed by plants and is transported to the leaves. Statement B : Denitrification is carried by bacteria Nitrosomonas and/or Nitrococcus .
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Denitrification is carried by bacteria Pseudomonas and Thiobacillus.
336768
What happens to ammonia formed by ammonification?
1 Some gets volatilized
2 Most of it gets converted into nitrate by soil bacteria
3 Some will undergo biological nitrogen fixation
4 Both (1) and (2)
Explanation:
Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria.
BIOXI12: MINERAL NUTRITION
336769
Identify the correct sequence with respect to nitrification.
Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. These nitrifying bacteria are chemoautotrophs. The nitrate thus formed is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids.
BIOXI12: MINERAL NUTRITION
336770
Crop rotation is used by farmers to increase
1 Soil fertility
2 Community area
3 Organic content of soil
4 Nitrogenous content in the soil
Explanation:
Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons.
BIOXI12: MINERAL NUTRITION
336771
\(\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}\) This reaction is catalyzed by the enzyme
1 Isomerase
2 Nitrogenase
3 Carbonic anhydrase
4 Higase
Explanation:
Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase is capable of nitrogen reduction and is present exclusively in prokaryotes. Such microbes are called \(\mathrm{N}_{2}\) fixers.
BIOXI12: MINERAL NUTRITION
336772
Statement A : The nitrate thus formed is absorbed by plants and is transported to the leaves. Statement B : Denitrification is carried by bacteria Nitrosomonas and/or Nitrococcus .
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Denitrification is carried by bacteria Pseudomonas and Thiobacillus.
