-
question_answer1)
A trace element is an element which [CPMT 1971, 72]
A)
Is a radioactive and can be traced by Geiger counter done
clear
B)
Is required in very minute amounts done
clear
C)
Draws other element out of protoplasm done
clear
D)
Was one of the first to be discovered in protoplasm done
clear
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question_answer2)
Micro-nutrients are [CPMT 1985, 87, 2002]
A)
Less important in nutrition than macro-nutrients done
clear
B)
As important in nutrition as macro-nutrients done
clear
C)
May be omitted from culture media without any detrimental effect on the plant done
clear
D)
Called micro because they play only minor role in nutrition done
clear
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question_answer3)
Deficiency of molybdenum cause [CPMT 1986]
A)
Poor development of vasculature done
clear
B)
Bending of leaf tip done
clear
C)
Yellowing of leaves done
clear
D)
Mottling and necrosis of leaves done
clear
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question_answer4)
Which of the following is a micro-nutrient or a trace element [MP PMT 1990; CPMT 1980; DPMT 1985; RPMT 1995]
A)
Mg done
clear
B)
Zn done
clear
C)
Ca done
clear
D)
P done
clear
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question_answer5)
Photosynthetic photolysis of water takes place in presence of [MP PMT 1997]
A)
Mn done
clear
B)
Cl done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer6)
Copper is the component of
A)
Cytochrome oxidase done
clear
B)
Plastocyanin done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer7)
Which of the following is widely used metal cofactor [DPMT 1991; CBSE PMT 2003]
A)
\[C{{a}_{2}}\] done
clear
B)
\[A{{l}_{3}}\] done
clear
C)
\[N{{i}_{2+}}\] done
clear
D)
\[M{{g}_{3+}}\] done
clear
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question_answer8)
The cauliflower become brown due to deficiency of
A)
Sodium done
clear
B)
Calcium done
clear
C)
Boron done
clear
D)
Nitrogen done
clear
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question_answer9)
Apple fruit develop internal cork due to deficiency of
A)
Magnesium done
clear
B)
Iron done
clear
C)
Manganese done
clear
D)
Boron done
clear
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question_answer10)
Top rot of tobacco is due to deficiency of
A)
Iron done
clear
B)
Manganese done
clear
C)
Molybdenum done
clear
D)
Boron done
clear
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question_answer11)
Mottle leaf in citrus plants is due to deficiency of
A)
Boron done
clear
B)
Magnesium done
clear
C)
Zinc done
clear
D)
None of these done
clear
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question_answer12)
The deficiency of molybdenum induces
A)
Citrus die back disease done
clear
B)
Pea rossete disease done
clear
C)
Cauliflower whip tail disease done
clear
D)
White bud of maize done
clear
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question_answer13)
? Which of the following micro-element is absorbed by leaves
A)
Phosphorous done
clear
B)
Boron done
clear
C)
Zinc done
clear
D)
Iron done
clear
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question_answer14)
Symptoms of manganese deficiency can be overcome by the use of
A)
Manganese sulphate done
clear
B)
Manganese dioxide done
clear
C)
Colloidal manganese done
clear
D)
None of these done
clear
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question_answer15)
Elements which maintains the solubility of calcium in the cells
A)
Manganese done
clear
B)
Copper done
clear
C)
Iron done
clear
D)
Boron done
clear
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question_answer16)
The elements arsenic, copper and murcury have which of the following effect
A)
Catalytic effect done
clear
B)
pH effect done
clear
C)
Toxic effect done
clear
D)
Antagonastic action done
clear
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question_answer17)
Boron is absorbed as
A)
Borate ions done
clear
B)
Solution in water done
clear
C)
As boron trichloride done
clear
D)
None of the above done
clear
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question_answer18)
Places where there is copper deposit the soil is
A)
Suitable for plant growth done
clear
B)
Most suitable for plant growth done
clear
C)
Toxic done
clear
D)
None of the above done
clear
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question_answer19)
Iron is present in which of the following
A)
Citrus fruits done
clear
B)
Mango done
clear
C)
Alurone grains done
clear
D)
None of the above done
clear
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question_answer20)
Which of the following is not a micro or trace element [MP PMT 1992, 2003]
A)
Boron done
clear
B)
Molybdenum done
clear
C)
Manganese done
clear
D)
Calcium done
clear
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question_answer21)
That element which helps in electron transport in the process of photosynthesis
A)
Zinc done
clear
B)
Molybdenum done
clear
C)
Boron done
clear
D)
Chlorine done
clear
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question_answer22)
The micronutrient least required by plants is [DPMT 1992]
A)
Cobalt done
clear
B)
Nickel done
clear
C)
Manganese done
clear
D)
Boron done
clear
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question_answer23)
Manganese\[\left( M{{n}^{++}} \right)\]ions are required in which part of the plant
A)
Leaves and fruits done
clear
B)
Leaves and seeds done
clear
C)
Fruits and seeds done
clear
D)
Fruit and stem done
clear
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question_answer24)
'Petiole crack' is caused by the deficiency of
A)
Potassium done
clear
B)
Boron done
clear
C)
Molybdenum done
clear
D)
Iron done
clear
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question_answer25)
Which one of the following elements plays an important role in biological nitrogen fixation [BHU 1985; CBSE PMT 1995; AIEEE 2004]
A)
Molybdenum done
clear
B)
Manganese done
clear
C)
Copper done
clear
D)
Zinc done
clear
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question_answer26)
Which one of the following nutrient serves as micro elements for plant growth [MP PMT 1995]
A)
Manganese, copper, calcium done
clear
B)
Sodium, potassium, boron done
clear
C)
Sodium, nickel, chlorine done
clear
D)
Copper, molybdenum, zinc done
clear
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question_answer27)
Which of the following is micro-element in plant [CBSE PMT 1996]
A)
Manganese done
clear
B)
Nitrogen done
clear
C)
Magnesium done
clear
D)
Calcium done
clear
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question_answer28)
Browning of cauliflower takes place due to deficiency of which one of the following elements
A)
Copper done
clear
B)
Molybdenum done
clear
C)
Potassium done
clear
D)
Manganese done
clear
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question_answer29)
Which one of the following is a micro-element
A)
Copper done
clear
B)
Calcium done
clear
C)
Magnesium done
clear
D)
Oxygen done
clear
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question_answer30)
One of the causes of littles leaf disease is due to deficiency of
A)
Copper done
clear
B)
Sodium done
clear
C)
Molybdenum done
clear
D)
Zinc done
clear
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question_answer31)
Fall of immature leaf is due to the deficiency of [AFMC 1997]
A)
Sulphur done
clear
B)
Phosphorus done
clear
C)
Sodium done
clear
D)
Zinc done
clear
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question_answer32)
Which of the following is the importance of molybdenum in plants metabolism [Pb. PMT 1999]
A)
Carbon assimilation done
clear
B)
Nitrate reduction done
clear
C)
Plant breeding done
clear
D)
Chromosome contraction done
clear
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question_answer33)
Which of the following element is a component of ferredoxin [CPMT 1989]
A)
Cu done
clear
B)
Mn done
clear
C)
Zn done
clear
D)
Fe done
clear
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question_answer34)
Deficiency of iron causes [BHU 1987; MP PMT 1995]
A)
Bending of leaf tip done
clear
B)
Interveinal chlorosis first on young leaves done
clear
C)
Decrease of protein synthesis done
clear
D)
Reduced leaves and stunted growth done
clear
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question_answer35)
Iron is mainly absorbed in the
A)
Ferrous form done
clear
B)
Ferric form done
clear
C)
Both [a] and [b] done
clear
D)
None of these done
clear
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question_answer36)
Heart rot of marigold is caused by the deficiency of
A)
Chlorine done
clear
B)
Copper done
clear
C)
Boron done
clear
D)
Zinc done
clear
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question_answer37)
Important contribution of molybdenum is [MP PMT 1992; JIPMER 2002; CBSE PMT 2003]
A)
Flower growth done
clear
B)
Nitrogen fixation done
clear
C)
Chromosome condensation done
clear
D)
Carbon fixation done
clear
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question_answer38)
Function of zinc is [MP PMT 1992]
A)
Synthesis of chlorophyll done
clear
B)
Biosynthesis of 3 IAA done
clear
C)
Closing of stomata done
clear
D)
Oxidation of carbohydrate done
clear
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question_answer39)
Cytochrome oxidase has [BHU 1984; AIIMS 1992]
A)
Mo done
clear
B)
Fe done
clear
C)
Zn done
clear
D)
B done
clear
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question_answer40)
In a Citrus plantation, all the plants were found to be suffering from the die-back disease, spraying of fungicides was of no help. This problem was due to the deficiency of
A)
Copper done
clear
B)
Gibberellic acid done
clear
C)
Zinc done
clear
D)
Auxins done
clear
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question_answer41)
Plastocyanin is a protein containing [BHU 1989; CPMT 1999]
A)
Mo done
clear
B)
Zn done
clear
C)
Fe done
clear
D)
Cu done
clear
View Solution play_arrow
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question_answer42)
Which of the following are trace elements
A)
Boron and manganese done
clear
B)
Copper and zinc done
clear
C)
Chlorine and molybdenum done
clear
D)
All the above done
clear
View Solution play_arrow
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question_answer43)
The plants accept Zn as [CBSE PMT 2000]
A)
\[Zn\] done
clear
B)
\[Z{{n}^{2+}}\] done
clear
C)
\[ZnO\] done
clear
D)
\[ZnS{{O}_{4}}\] done
clear
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question_answer44)
Gray speck disease in oats takes place by the deficiency of [CBSE PMT 2003]
A)
Zinc done
clear
B)
Copper done
clear
C)
Potassium done
clear
D)
Manganese done
clear
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question_answer45)
Boron in green plants assists in [CBSE PMT 2003]
A)
Sugar transport done
clear
B)
Activation of enzymes done
clear
C)
Acting as enzyme cofactor done
clear
D)
Photosynthesis done
clear
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question_answer46)
Major role of minor essential elements is to act as [AIEEE 2004]
A)
Co-factors of enzymes done
clear
B)
Building blocks of important amino acids done
clear
C)
Constituents of hormones done
clear
D)
Binders of cell structure done
clear
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question_answer47)
The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport [CBSE PMT 2005]
A)
\[Cu,\,Mn,\,Fe\] done
clear
B)
\[Co,\,Ni,\,Mo\] done
clear
C)
\[Mn,\,Co,\,Ca\] done
clear
D)
\[Ca,\,K,\,Na\] done
clear
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