11.
The major portion of the dry weight of plants comprises of
A
Carbon, hydrogen and oxygen
B
Nitrogen, phosphorus and potassium
C
Calcium, magnesium and sulphur
D
Carbon, nitrogen and hydrogen
Answer :
Carbon, hydrogen and oxygen
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12.
Which of the following is not related to N2 fixation
A
Rhizobium
B
Anabaena
C
Pseudomonas
D
Azotobacter
Answer :
Pseudomonas
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13.
The crop grown under government control is of
A
Ferula
B
Curcuma
C
Papaver
D
Rauwolfia
Answer :
Papaver
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14.
Which of the following can fix atmospheric nitrogen ?
A
Albugo
B
Cystopus
C
Saprolegnia
D
Anabaena
Answer :
Anabaena
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15.
Which of the following deficiency may cause leaf tip bending
A
Sulphur
B
Nitrogen
C
Phosphorus
D
Calcium
Answer :
Sulphur
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16.
Which type of ovule is found in papaver
A
Hemitropous
B
Compylotropous
C
Amphitropous
D
Circinotropous
Answer :
Amphitropous
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17.
The major role of minor elements inside living organisms is to act as
A
binder of cell structure
B
co-factors of enzymes
C
building blocks of important amino acids
D
constituent of hormones
Answer :
co-factors of enzymes
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18.
By which part of Cinchona plant, quinine is obtained
A
Root
B
Stem
C
Leaf
D
Bark
Answer :
Bark
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19.
Which one is Cu++ containing pigment
A
Ferredoxin
B
Plastocyanin
C
Plastoquinone
D
Cytochrome
Answer :
Plastocyanin
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20.
Chlorosis of plants is caused by the deficiency of
A
Iron
B
Boron
C
Copper
D
Calcium
Answer :
Iron
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