Which one of the following is wrong statement?

(a) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also

(b) Root nodule forming nirogen fixers live as aerobes under free-living conditions

(c) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

(d) Nitrosomonas and Nitrobacter are chemoautotrophs

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A nitrogen fixing microbe associated with Azolla in rice fields is
(a) Spirulina 
(b) Anabaena
(c) Frankia
(d) Tolypothrix

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The function of leghaemoglobin in the root nodules of legumes is 

(1) oxygen removal

(2) nodule differentiation

(3) expression of nif gene

(4) inhibition of nitrogenase activity

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Nitrifying bacteria

(a) convert free nitrogen to nitrogen compounds
(b) convert proteins into ammonia
(c) reduce nitrates to free nitrogen
(d) oxidize ammonia to nitrates

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An organism used as a biofertilizer for raising soyabean crop is

(a) Azospirillum

(b) Rhizobium

(c) Nostoc

(d) Azotobacter

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An element playing important role in nitrogen fixation is

(a) molybdenum

(b) copper

(c) manganese

(d) zinc

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which one of the following is not a micronutrient?

(a) Molybdenum

(b) Magnesium

(c) Zinc

(d) Boron

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The free-living, anaerobic nitrogen-fixer is

(a) Beijerinckia

(b) Rhodospirillum

(c) Rhizobium

(d) Azotobacter

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The common nitrogen-fixer in paddy fields is

(a) Rhizobium

(b) Azospirillum

(c) Oscillatoria

(d) Frankia

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which of the folowing is a symbiotic nitrogen fixer?
(a) Glomus
(b) Azotobacter
(c) Frankia
(d) Azolla

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: