Which of the following is free-living aerobic non- photosynthetic nitrogen-fixing bacterium? (a) Nostoc (b) Azospirillum (c) Rhizobium (d) Azotobacter

Which of the following is free-living aerobic non-
photosynthetic nitrogen-fixing bacterium?
(a) Nostoc (b) Azospirillum
(c) Rhizobium (d) Azotobacter
by

1 Answer

Answer :

(d) Azotobacter
by

Related questions

A non-photosynthetic aerobic nitrogen fixing soil bacterium is (a) Rhizobium (b) Clostridium (c) Azotobacter (d) Klebsiella.

Description : A non-photosynthetic aerobic nitrogen fixing soil bacterium is (a) Rhizobium (b) Clostridium (c) Azotobacter (d) Klebsiella.

Last Answer : (c) Azotobacter

Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these

Description : Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these

Last Answer : c. Rhizobium

An organism used as a biofertilizer for raising soybean crop is (a) Azotobacter (b) Azospirillum (c) Rhizobium (d) Nostoc.

Description : An organism used as a biofertilizer for raising soybean crop is (a) Azotobacter (b) Azospirillum (c) Rhizobium (d) Nostoc.

Last Answer : (c) Rhizobium

___ is the example of associative, nonsymbiotic nitrogen fixing organism. (A) Rhizobium (B) Azorhizobium (C) Pseudomonas ‘ (D) Azospirillum

Description : ___ is the example of associative, nonsymbiotic nitrogen fixing organism. (A) Rhizobium (B) Azorhizobium (C) Pseudomonas ‘ (D) Azospirillum

Last Answer : (C) Pseudomonas ‘

One of the free-living, anaerobic nitrogen-fixeris (a) Beijerinckia (b) Rhodospirillum (c) Rhizobium (d) Azotobacter.

Description : One of the free-living, anaerobic nitrogen-fixeris (a) Beijerinckia (b) Rhodospirillum (c) Rhizobium (d) Azotobacter.

Last Answer : b) Rhodospirillum

A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (a) Tolypothrix (b) Chlorella (c) Nostoc (d) Anabaena.

Description : A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (a) Tolypothrix (b) Chlorella (c) Nostoc (d) Anabaena.

Last Answer : (d) Anabaena.

83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3) Root nodule forming nitrogen fixers live as aerobes under free-living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Description : 83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3 ... living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Last Answer : Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix nitrogen in the free-living state (c) cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids (d) like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host’s cortex

Description : All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix ... its host plant through root hair deformation and stimulates cell proliferation in the host's cortex

Last Answer : (b) can fix nitrogen in the free-living state

The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.

Description : The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.

Last Answer : (b) Azospirillum

The essential element required by the N fixing bacterium Rhizobium

Description : The essential element required by the N fixing bacterium Rhizobium

Last Answer : Ans. Mo

Which of the following is a free living nitrogen fixing bacterium present in the soil

Description : 19.Which of the following is a free living nitrogen fixing bacterium present in the soil (a)Nitrosomonas (b)Rhizobium (c)Azotobacter (d)Pseudomonas

Last Answer : ANS.(C) Azotobacter

Which of the following is non-symbiotic biofertilizer? (a) Anabaena (b) Rhizobium (c) VAM (d) Azotobacter

Description : Which of the following is non-symbiotic biofertilizer? (a) Anabaena (b) Rhizobium (c) VAM (d) Azotobacter

Last Answer : (d) Azotobacter

Which of the following is also used as a Bio fertilizer? (1) Rhizobium (2) Azotobactar (3) Azospirillum (4) All of the above

Description : Which of the following is also used as a Bio fertilizer? (1) Rhizobium (2) Azotobactar (3) Azospirillum (4) All of the above

Last Answer : (4) All of the above Explanation: Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Bio fertilizers.

What culture should be given priority in groundnut cultivation? 1) Mycorrhiza 2) Rhizobium 3) Phosphobacteria 4) Azospirillum]

Description : What culture should be given priority in groundnut cultivation? 1) Mycorrhiza 2) Rhizobium 3) Phosphobacteria 4) Azospirillum]

Last Answer : 2) Rhizobium

What culture should be given priority in groundnut cultivation? a. Mycorrhiza b. Rhizobium c. Phosphobacteria d. Azospirillum

Description : What culture should be given priority in groundnut cultivation? a. Mycorrhiza b. Rhizobium c. Phosphobacteria d. Azospirillum

Last Answer : b. Rhizobium

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) Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds (c) Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes (d) Anaerobic ammonium oxidation and 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

Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.

Description : Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.

Last Answer : (d) Escherichia and Agrobacterium.

The Ti plasmid, is often used for making transgenic plants. The plasmid is found in (a) Azotobacter (b) Rhizobium of the roots of leguminous plants (c) Agrobacterium (d) Yeast as a 2 mm plasmid.

Description : The Ti plasmid, is often used for making transgenic plants. The plasmid is found in (a) Azotobacter (b) Rhizobium of the roots of leguminous plants (c) Agrobacterium (d) Yeast as a 2 mm plasmid.

Last Answer : (c) Agrobacterium

The nitrogen fixing bacterium found on root surface of rice

Description : The nitrogen fixing bacterium found on root surface of rice

Last Answer : Ans.Azospirillum

Which is the free living soil bacteria in fixes nitrogen? Anatomy: Azotobacter.

Description : Which is the free living soil bacteria in fixes nitrogen? Anatomy: Azotobacter.

Last Answer : Who in 1939 suggested the name meson for middle-weight particles?

Which of the following is the pair of biofertilizers? (a) Azolla and BGA (b) Nostoc and legume (c) Rhizobium and grasses (d) Salmonella and E.coli

Description : Which of the following is the pair of biofertilizers? (a) Azolla and BGA (b) Nostoc and legume (c) Rhizobium and grasses (d) Salmonella and E.coli

Last Answer : (a) Azolla and BGA

An example of endomycorrhiza is (a) Nostoc (b) Glomus (c) Agaricus (d) Rhizobium.

Description : An example of endomycorrhiza is (a) Nostoc (b) Glomus (c) Agaricus (d) Rhizobium.

Last Answer : (b) Glomus

Which one of the following is not a biofertiliser? (a) Agrobacterium (b) Rhizobium (c) Nostoc (d) Mycorrhiza

Description : Which one of the following is not a biofertiliser? (a) Agrobacterium (b) Rhizobium (c) Nostoc (d) Mycorrhiza

Last Answer : (a) Agrobacterium

Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma

Description : Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma

Last Answer : (c) Trichoderma, Baculovirus, Bacillus thuringiensis

Rhizobium is a kind of – (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria

Description : Rhizobium is a kind of – (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria

Last Answer : (2) Symbiotic bacteria Explanation: Rhizobia are soil bacteria that fix nitrogen after becoming established inside root nodules of legumes. They are the only nitrogenfixing bacteria living in a symbiotic relationship with legumes. Common crop and forage legumes are peas, beans, clover, and soy.

Rhizobium is a kind of (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria

Description : Rhizobium is a kind of (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria

Last Answer :  Symbiotic bacteria

3. Which bacterium is used in the production of insulin by genetic engineering? a. Saccharomyces b. Rhizobium c. Escherichia d. Mycobacterium

Description : 3. Which bacterium is used in the production of insulin by genetic engineering? a. Saccharomyces b. Rhizobium c. Escherichia d. Mycobacterium

Last Answer : Ans: Escherichia

Azotobacter and Beijerinckia are the examples of (a) Symbiotic nitrogen-fixers (b) Non-symbiotic nitrogen-fixers (c) Ammonifying bacteria (d) Disease causing bacteria

Description : Azotobacter and Beijerinckia are the examples of (a) Symbiotic nitrogen-fixers (b) Non-symbiotic nitrogen-fixers (c) Ammonifying bacteria (d) Disease causing bacteria

Last Answer : Ans. ((b))

Azotobacter fixes atmospheric nitrogen in the soil by— (A) Symbiotically (B) Non-symbiotically (C) Both (A) and (B) (D) None of these

Description : Azotobacter fixes atmospheric nitrogen in the soil by— (A) Symbiotically (B) Non-symbiotically (C) Both (A) and (B) (D) None of these

Last Answer : (A) Symbiotically

Free-living nitrogen fixing microorganisms are - (1) Rhizobia (2) Soil fungi (3) Vesicular arbuscular mycorrhiza (4) Blue green algae

Description : Free-living nitrogen fixing microorganisms are - (1) Rhizobia (2) Soil fungi (3) Vesicular arbuscular mycorrhiza (4) Blue green algae

Last Answer : (1) Rhizobia Explanation: Rhizobia are soil bacteria that fix nitrogen (diazotrophs) after becoming established inside root nodules of legumes. Rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are Gram-negative, motile, non-sporulating rods.

Free-living nitrogen fixing microorganisms are (1) Rhizobia (2) Soil fungi (3) Vesicular arbuscular mycorrhiza (4) Blue green algae

Description : Free-living nitrogen fixing microorganisms are (1) Rhizobia (2) Soil fungi (3) Vesicular arbuscular mycorrhiza (4) Blue green algae

Last Answer : Rhizobia

Select the correct statement: (a) Legumes are incapable of fixing nitrogen (b) Legumes fix nitrogen through bacteria living in fruits root (c) Legumes fix nitrogen only by bacteria present in nodules (d) None of the above

Description : Select the correct statement: (a) Legumes are incapable of fixing nitrogen (b) Legumes fix nitrogen through bacteria living in fruits root (c) Legumes fix nitrogen only by bacteria present in nodules (d) None of the above

Last Answer : Ans. (c)

What is Azofication (a) It is also known as composite fixation of nitrogen. (b) It is also known as free fixation of nitrogen (c) It is also known as nitrogen fixed by Rhizobium bacteria ` (d) It is also known as nitrogen gain through rains or snow

Description : What is Azofication (a) It is also known as composite fixation of nitrogen. (b) It is also known as free fixation of nitrogen (c) It is also known as nitrogen fixed by Rhizobium bacteria ` (d) It is also known as nitrogen gain through rains or snow

Last Answer : (a) It is also known as composite fixation of nitrogen.

Select the correct statement from the following. (a) Biogas is produced by the activity of aerobic bacteria on animal waste. (b) Methanobacterium is an aerobic bacterium found in rumen of cattle. (c) Biogas, commonly called gobar gas, is pure methane. (d) Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Description : Select the correct statement from the following. (a) Biogas is produced by the activity of aerobic bacteria on animal waste. (b) Methanobacterium is an aerobic bacterium found in rumen of ... sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Last Answer : (d) Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

“Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium

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

“Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium

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

Name some non-symbiotic nitrogen fixing prokaryote. -Biology

Description : Name some non-symbiotic nitrogen fixing prokaryote. -Biology

Last Answer : answer:

Non leguminous nitrogen fixing trees

Description : Non leguminous nitrogen fixing trees

Last Answer : Ans. Alnus nepalensis

Which of the following species does not have the ability to fix atmospheric nitrogen? (a) Azotobactor (b) Anabaena (c) Nostoc (d) Spirogyra

Description : Which of the following species does not have the ability to fix atmospheric nitrogen? (a) Azotobactor (b) Anabaena (c) Nostoc (d) Spirogyra

Last Answer : (d) Spirogyra

Which aquatic fern performs nitrogen fixation? (a) Azolla (b) Nostoc (c) Salvia (d) Salvinia

Description : Which aquatic fern performs nitrogen fixation? (a) Azolla (b) Nostoc (c) Salvia (d) Salvinia

Last Answer : (a) Azolla

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen. (iii)Chemosynthetic autotrophic bacteria synthesize cellulose from glucose. (iv) Mycoplasma lack a cell wall and can survive without oxygenThe correct statements are (a) (ii) and (iii) (b) (i),(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)..

Description : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes ... iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv).

Last Answer : (d) (i), (ii) and (iv)

Rhizobium fixes atmospheric nitrogen/ha to the soil

Description : Rhizobium fixes atmospheric nitrogen/ha to the soil

Last Answer : Ans. 50-100 kg

Select the mismatch. (a) Rhodospirillum – Mycorrhiza (b) Anabaena – Nitrogen fixer (c) Rhizobium – Alfalfa (d) Frankia – Alnus

Description : Select the mismatch. (a) Rhodospirillum – Mycorrhiza (b) Anabaena – Nitrogen fixer (c) Rhizobium – Alfalfa (d) Frankia – Alnus

Last Answer : (a) Rhodospirillum – Mycorrhiza

Rhizobium fixes nitrogens in the roots of _____, so they don't need to be fertilized; in fact they add nitrogen to the soil. a. corn b. legumes c. wheat d. grasses e. oats

Description : Rhizobium fixes nitrogens in the roots of _____, so they don't need to be fertilized; in fact they add nitrogen to the soil. a. corn b. legumes c. wheat d. grasses e. oats

Last Answer : b. legumes

______ helps in fixation of nitrogen in rice field in association with root of Cycas plant. a) rhizobium b)fungus c)cyano bacteria d)bacteria

Description : ______ helps in fixation of nitrogen in rice field in association with root of Cycas plant. a) rhizobium b)fungus c)cyano bacteria d)bacteria

Last Answer : c)cyano bacteria

Select the mismatch : (1) Rhodospirillum - Mycorrhiza (2) Anabaena - Nitrogen fixer (3) Rhizobium - Alfalfa (4) Frankia - Alnus

Description : Select the mismatch : (1) Rhodospirillum - Mycorrhiza (2) Anabaena - Nitrogen fixer (3) Rhizobium - Alfalfa (4) Frankia - Alnus

Last Answer : (1) Rhodospirillum - Mycorrhiza

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? (a) Pseudomonas (b) Mycoplasma (c) Nostoc (d) Bacillus

Description : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? (a) Pseudomonas (b) Mycoplasma (c) Nostoc (d) Bacillus

Last Answer : (b) Mycoplasma

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ? (1) Pseudomonas (2) Mycoplasma (3) Nostoc (4) Bacillus

Description : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ? (1) Pseudomonas (2) Mycoplasma (3) Nostoc (4) Bacillus

Last Answer : (2) Mycoplasma

Azotobacter and Bacillus polymyxa are the examples of (a) pathogenic bacteria (b) decomposers (c) symbiotic N2 fixer (d) non-symbiotic N2 fixer.

Description : Azotobacter and Bacillus polymyxa are the examples of (a) pathogenic bacteria (b) decomposers (c) symbiotic N2 fixer (d) non-symbiotic N2 fixer.

Last Answer : (d) non-symbiotic N2 fixer

Under anaerobic conditions, bacterium Pseudomonas changes (a) Nitrate to molecular nitrogen (b) Nitrate to ammonia (c) Nitrate to nitrite (d) Nitrite to nitrate

Description : Under anaerobic conditions, bacterium Pseudomonas changes (a) Nitrate to molecular nitrogen (b) Nitrate to ammonia (c) Nitrate to nitrite (d) Nitrite to nitrate

Last Answer : Ans. ((a))