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question_answer1)
Most of the plants obtain or absorb nitrogen from soil in the form of [AFMC 1975; JIPMER 1987; CPMT 1982, 84; DPMT 1990; Orissa PMT 2002; MP PMT 2005]
A)
Free nitrogen gas done
clear
B)
Nitric acid done
clear
C)
Nitrite done
clear
D)
Nitrates done
clear
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question_answer2)
Which of the following deficiency may cause the reduction in the growth of leaves
A)
Nitrogen done
clear
B)
Sodium done
clear
C)
Manganese done
clear
D)
Iron done
clear
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question_answer3)
The possibility of increase of infectious disease become more due to more supply of
A)
Potassium done
clear
B)
Magnesium done
clear
C)
Copper done
clear
D)
Nitrogen done
clear
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question_answer4)
Cell elongation is adversely affected by
A)
Sodium done
clear
B)
Cobalt done
clear
C)
Manganese done
clear
D)
Nitrogen done
clear
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question_answer5)
Nitrogen is a component of
A)
Protein done
clear
B)
Chlorophyll done
clear
C)
Nucleic acid done
clear
D)
All the above done
clear
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question_answer6)
An important essential element is necessary in plants for protein synthesis [MP PMT 1991]
A)
Calcium done
clear
B)
Phosphorus done
clear
C)
Magnesium done
clear
D)
Nitrogen done
clear
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question_answer7)
Element required by plant in large quantity is [CPMT 1984, 85; DPMT 1992]
A)
Nitrogen done
clear
B)
Calcium done
clear
C)
Sulphur done
clear
D)
Phosphorus done
clear
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question_answer8)
Nitrogen is an important constituent of [MP PMT 1994, 2002]
A)
Proteins done
clear
B)
Lipids done
clear
C)
Carbohydrates done
clear
D)
Polyphosphates done
clear
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question_answer9)
One of the ways in which the nitrogen of atmosphere is converted into nitrate for plants is by the action of
A)
Temperature done
clear
B)
Lightning done
clear
C)
Denitrifying bacteria done
clear
D)
Decay done
clear
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question_answer10)
Which one of the following plant cannot fix atmospheric nitrogen directly
A)
Bean done
clear
B)
Castor done
clear
C)
Gram done
clear
D)
Pea done
clear
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question_answer11)
Ammonium sulphate is
A)
Enzyme done
clear
B)
Fertilizer done
clear
C)
Weed killer done
clear
D)
Pesticide done
clear
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question_answer12)
Which one of the following can fix atmospheric nitrogen directly
A)
Pea done
clear
B)
Brassica done
clear
C)
Castor done
clear
D)
Petunia done
clear
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question_answer13)
Members of bean family are particularly important for rotation of crop, because
A)
They add green manure done
clear
B)
They add nitrates to soil done
clear
C)
They make soil porous done
clear
D)
They add calcium to soil done
clear
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question_answer14)
Nodules with nitrogen fixing bacteria are present in [AFMC 2001; CPMT 2003]
A)
Cotton done
clear
B)
Gram done
clear
C)
Wheat done
clear
D)
Mustard done
clear
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question_answer15)
Legume plants are important because they [CPMT 2002]
A)
Help in \[N{{O}_{2}}\] fixation done
clear
B)
Not help in \[N{{O}_{2}}\] fixation done
clear
C)
Increased soil fertility done
clear
D)
All of these done
clear
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question_answer16)
Knot like bodies known as 'nodules' found in the roots of groundnut plant are produced by [BHU 2003]
A)
Azospirillum done
clear
B)
Azotobacter done
clear
C)
Pseudomonas done
clear
D)
Rhizobium done
clear
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question_answer17)
Nitrogen fixation means [MHCET 2003]
A)
\[{{N}_{2}}\] changes in \[NO_{3}^{-}\] done
clear
B)
\[{{N}_{2}}\] changes in \[N{{H}_{3}}\] done
clear
C)
\[NO_{2}^{-}\] change into nitrates done
clear
D)
None of these done
clear
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question_answer18)
Which of the following is a fertilizer
A)
Ammonium chloride done
clear
B)
Urea done
clear
C)
Calcium citrate done
clear
D)
Calcium carbonate done
clear
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question_answer19)
Fertilizers have a formula written in a set of three figures 8 - 10- 22. What for does it stand
A)
% of Ca, Mg, P done
clear
B)
% of N, S, P done
clear
C)
% of N, P, K done
clear
D)
% of Fe, Mg, K done
clear
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question_answer20)
Symbiotic microorganism is [MP PMT 2003; AIEEE 2004]
A)
Clostridium done
clear
B)
Azotobacter done
clear
C)
Rhizobium done
clear
D)
Chromatium done
clear
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question_answer21)
Nif genes occur in [CPMT 2004]
A)
Rhizobium done
clear
B)
Aspergillus done
clear
C)
Penicillium done
clear
D)
Streptococcus done
clear
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question_answer22)
Nitrates are converted to nitrogen by [Pb. PMT 2004]
A)
Nitrogen fixing bacteria done
clear
B)
Ammonification bacteria done
clear
C)
Denitrifying bacteria done
clear
D)
Nitrifying bacteria done
clear
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question_answer23)
Symbiotic nitrogen fixation in non-leguminous plant is carried out by [Orissa JEE 2005]
A)
Azotobacter done
clear
B)
Brodyrhizobiun done
clear
C)
Clostridium done
clear
D)
Frankia done
clear
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question_answer24)
The conversion of ammonia into nitrites and nitrates is called [J&K CET 2005]
A)
Ammonification done
clear
B)
Nitrification done
clear
C)
Denitrification done
clear
D)
All of these done
clear
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question_answer25)
Which of the following pigments is essential for nitrogen fixation by leguminous plants [HP PMT 2005]
A)
Anthocyanin done
clear
B)
Phycocyanin done
clear
C)
Phycoerythrin done
clear
D)
Leghaemoglobin done
clear
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question_answer26)
\[{{N}_{2}}\] fixation is [Orissa JEE 2005]
A)
\[{{N}_{2}}\to N{{H}_{3}}\] done
clear
B)
\[{{N}_{2}}\to N{{O}_{3}}\] done
clear
C)
\[{{N}_{2}}\to \]Amino acid done
clear
D)
Both [a] and [b] done
clear
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