Description : Microbial degradation of nitrates into atmospheric nitrogen is known as- (1) Ammonification (2) Nitrification (3) Denitrification (4) Putrefaction
Last Answer : (3) Denitrification Explanation: Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as ... (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
Description : The process in which nitrogen is released into the atmosphere is (1) Ammonification (2) Denitrification (3) Biological nitrogen Fixation (4) Nitirification
Last Answer : Biological nitrogen Fixation
Description : Nitrogen oxidation (nitrification)refers to the A- conversion of ammonium ions into nitrates through the activities of certain bacteria B- changing of atmospheric nitrogen (N2) to nitrogen compounds C- sulfur is oxidized to the sulfate form through Thiobacillusbacteria D- none of the above
Last Answer : conversion of ammonium ions into nitrates through the activities of certain bacteria
Description : Thiobacillus is a group of bacteria helpful in carrying out (a) denitrification (b) nitrogen fixation (c) chemoautotrophic fixation (d) nitrification.
Last Answer : (a) denitrification
Description : Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere? (a) Aerobic nitrate oxidation and nitrite reduction (b) ... fixation by Rhizobium in root nodules of legumes (d) Anaerobic ammonium oxidation and denitrification
Last Answer : (d) Anaerobic ammonium oxidation and denitrification
Description : Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D (a) Nitrification Ammoni- Animals Plants fication (b) ... Plants Animals fication (c) Nitrification Denitri- Animals Plants fication (d) Denitrification Nitrification Plants Animals
Last Answer : (b) Denitrification Ammoni- Plants Animals fication
Description : Ammonification in the nitrogen cycle? -Biology
Last Answer : answer:
Description : Which of the process is known as nitrification? (1) Reaction of Nitrogen Monoxide with oxygen to form nitric acid (2) Reaction of nitrogen dioxide with water to form nitric acid (3) Conversion of ammonia to nitrites (4) Conversion of nitrite to nitric oxide
Last Answer : Conversion of ammonia to nitrites
Description : Processes that break down the herbicides after application includes............................ a). Photo and microbial degradation b). adsorption and uptake c). leaching and runoff d). volatilization and run off
Last Answer : a). Photo and microbial degradation
Description : A transport process in herbicide removal a).volatilization b).photo-decomposition c).chemical decomposition d).microbial degradation
Last Answer : a).volatilization
Description : The major means for herbicide dissipation is which type of following degradation a). Microbial b). Chemical c). photo d). Physical
Last Answer : a). Microbial
Description : What role does denitrification play in the nitrogen cycle? -Biology
Description : (3) Conversion of ammonia to nitrites Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The oxidation of ammonia ... -oxidizing archaea (AOA). Nitrification is an important step in the nitrogen cycle in soil.
Last Answer : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorous (4) None of these
Description : Which of the following is a primary pollutant in atmospheric air? A. Cl2 B. SO3 C. Nitrates D. Sulphates
Last Answer : A. Cl2
Description : Marine teleosts, undergoing putrefaction, emit sharp characteristic foul odor, which is due to the production of
Last Answer : Marine teleosts, undergoing putrefaction, emit sharp characteristic foul odor, which is due to the ... Hydrogen sulfide C. Ammonia D. Lactic Acid
Description : High acid foods with a pH above 5.3 are especially subjected to A- flat sour spoilage B- putrefaction C- both (a) and (b) D- TA spoilage
Last Answer : both (a) and (b)
Description : Plants absorb dissolved nitrates from soil and convert them into (a) Free nitrogen (b) Urea (c) Ammonia (d) Proteins
Last Answer : Ans:(a)
Description : Nitrifying bacteria (a) oxidise ammonia to nitrates (b) convert free nitrogen to nitrogen compounds (c) convert proteins into ammonia (d) reduce nitrates to free nitrogen.
Last Answer : (a) oxidise ammonia to nitrates
Description : What happened when an excess amount of Nitrogen Fertilizer is Introduced in to Soil Ecosystem? A. Soil Decay B. Soil Acidi_cation C. Soil Residue D. Microbial Activity
Last Answer : D. Microbial Activity
Description : Importance of ammonification? -Biology
Description : Which Bacteria Help in Ammonification ?
Last Answer : : Bacillus mycoidis and Bacillus radomosis help in ammonification of bacteria.
Description : Nitrates are converted to nitrogen by
Last Answer : Nitrates are converted to nitrogen by A. Nitrogen fixing bacteria B. Ammonification bacteria C. Denitrifying bacteria D. Nitrifying bacteria
Description : Higher plants take up nitrogen as (a) Nitrites only (b) Nitrates only (c) Nitrates and ammonia (d) Urea
Last Answer : Ans:(c)
Description : Biofertilizers convert nitrogen to (1) nitrates (2) ammonia (3) nitrogenase (4) amino acids
Last Answer : (2) ammonia Explanation: Bio-fertilizers are microorganisms which bring about nutrient enrichment of soil by enhancing the availability of nutrients to crops. The micro-organisms which act as bio ... bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.
Description : If the sewage is fully oxidized, the nitrogen is in the form of – (1) Nitrites (2) Ammonia (3) Nitramines (4) Nitrates
Last Answer : (4) Nitrates Explanation: Oxidized forms of nitrogen include nitrite (NO2) and nitrate (NO3). Nitrogen mainly occurs in wastewater in this form. Because nitrite is easily oxidized to nitrate, nitrate is the compound predominantly found in groundwater and surface waters.
Description : In sewage having fully oxidised organic matter, the nitrogen exists in the form of A. Nitrites B. Nitrates C. Free ammonia D. Aluminoid nitrogen
Last Answer : ANS: B
Description : Nitrogen cycle of sewage, is A. Liberation of ammonia-formation of nitrites-formation of nitratesliberation of nitrogen B. Liberation of nitrogen-liberation of ammonia-formation of ... of ammonia D. Formation of nitrates-formation of nitrites-liberation of nitratesliberation of nitrates
Last Answer : ANS: A
Description : A well oxidized sewage contains nitrogen mainly as A. Nitrates B. Nitrites C. Free ammonia D. None of these
Description : Biofertilizers convert nitrogen to _______ . (1) nitrates (2) ammonia (3) nitrogenase (4) amino acids
Last Answer : ammonia
Description : If the sewage is fully oxidized, the nitrogen is in the form of (1) Nitrites (2) Ammonia (3) Nitramines (4) Nitrates
Last Answer : Nitrates
Description : Exposure to __________ accelerates the degradation of plastics. (A) Ultraviolet radiation (B) High atmospheric temperature (C) High ambient temperature (D) Damp atmosphere
Last Answer : A) Ultraviolet radiation
Description : Nitrification is the biological process of converting – (1) N9 into nitrate (2) N2 into nitrite (3) Ammonia into nitrite (4) Ammonia into N2
Last Answer : (3) Ammonia into nitrite Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The transformation of ammonia ... limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.
Description : Nitrification is the biological process of converting (1) N2 into nitrate (2) N2 into nitrite (3) Ammonia into nitrite (4) Ammonia into N2
Last Answer : Ammonia into nitrite
Description : Lowland applied nitrification inhibitors
Last Answer : Ans. Oxamide (31%N) and Thiourea (36.8%N)
Description : The crop oilcake, which has highest nitrification rate
Last Answer : Ans. Groundnut
Description : The renewal of NO3 involves release of ___________ from organic fraction of the soil and its rapid nitrification: a. NO2 b. NH4 c. N d. NO
Last Answer : NH4
Description : Which of the following factors does not affect the nitrification ? (A) Air (B) Seed (C) Temperature (D) Moisture
Last Answer : (B) Seed
Description : Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in (A) Coagulation and flocculation of colloids (B) Oxidation of carbonaceous matter to CO2 (C) ... to the nitrite and eventually to the nitrate (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which is the optimum PH for nitrification? (Agriculture MCQ) a. 8.5 b. 9.5 c. 10 d. 7.5
Last Answer : a. 8.5
Description : “Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium
Last Answer : b. B Nitrogen
Description : Which Bacteria convert atmospheric nitrogen into nitrogenous compound? -General Knowledge
Last Answer : The answer is 'Nitrogen fixing bacteria'
Description : Which Bacteria convert atmospheric nitrogen into nitrogenous compound?
Last Answer : Nitrogen fixing bacteria
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Why is microbial control necessary and what are some of the factors that go into the choice of a particular antimicrobial agent?
Last Answer : The control of microorganisms is an important way of preventing pathogens from reaching the body.Sterilizing laboratory equipment, hospital supplies, and industrial apparatus helps contain contamination.The choice of a ... , the acidity or alkalinity of the area, and the presence of organic matter.
Description : Preservation methods such as salting result in the microbial cells. a. Loss Of Salt From b. Gain Of Water Into c. Loss Of Water From d. Lysis Of
Last Answer : c. Loss Of Water From
Description : addition of phophates and nitrates/fertilizers into water leads to
Last Answer : addition of phophates and nitrates/fertilizers into water leads to A. Increased grwoth of ... algal growth D. Nutrient enrichment/eutrophication .