81.
Which of the following is not caused by deficiency of mineral
A
Chlorosis
B
Etiolation
C
Shortening of internodes
D
Necrosis
Answer :
Etiolation
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82.
Magnesium is found in
A
Chlorophyll
B
Carotenoid
C
Phycobilin
D
Cytochrome
Answer :
Chlorophyll
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83.
Restlessness (anxeity) and insomnia is curd by the drug obtained from
A
Papaver
B
Rauwolfia
C
Ferula
D
Cinchona
Answer :
Papaver
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84.
A plant requires magnesium for
A
protein synthesis
B
chlorophyll synthesis
C
cell wall development
D
holding cells together
Answer :
chlorophyll synthesis
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85.
Hydroponics is a
A
Soilless culture
B
Water less Culture
C
Airless culture
D
None of the above
Answer :
Soilless culture
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86.
Which of the following elements is a constituent of biotin?
A
Sulphur
B
Magnesium
C
Calcium
D
Phosphorus
Answer :
Sulphur
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87.
The process of converting ammonia to nitrate by bacteria is known as
A
Ammonification
B
Nitrification
C
Nitrogen fixation
D
Denitrification
Answer :
Nitrification
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88.
Which of the following is not caused by deficiency of mineral nutrition?
A
Necrosis
B
Chlorosis
C
Etiolation
D
Shortening of internodes
Answer :
Etiolation
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89.
An element playing important role in nitrogen fixation is :
A
Molybdenum
B
Copper
C
Manganese
D
Zinc
Answer :
Molybdenum
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90.
The plant ash is an indication of
A
Organic matter of plant
B
Waste product
C
Mineral salt absorbed by plants
D
None of the above
Answer :
Mineral salt absorbed by plants
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