Q151. Select the incorrect match.
(1) Mn - Photolysis of water
(2) Fe - Carbohydrate and
water translocation
(3) S - Constituent of
coenzyme A
(4) Ca - Synthesis of
middle lamella
Ans.2
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Q152. Lack or low level of_________causes an inhibition of cell division.
(1) Ca, Mg, Cu,K
(2) N, K, S, Mo
(3) N, K, Mg, S, Fe
(4) Zn, Mo, Mn
Ans.2
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Q153. Deficiency of which set of minerals first appear in older leaves?
(1) N, K, Mg
(2) N, Mg, Ca
(3) S, B, Mg
(4) Mg, Ca, Fe
Ans.1
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Q154. Primary symptom of manganese toxicity is
(1) Appearance of brown spots surrounded by chlorotic veins
(2) Loss of apical dominance
(3) Little leaf disease
(4) Reclamation disease
Ans.1
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Q155. (a) Xylem is the path of translocation of minerals
(b) Initial uptake of minerals into the symplast is slow
(c) Uptake of minerals in inner space is rapid.
(1) All are correct
(2) Only (a) is incorrect
(3) (b) & (c) are incorrect
(4) Only (c) is incorrect
Ans.3
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Q156. Nitrosomonas, Nitrococcus and Nitrocystis are involved in the process of
(1) Ammonification
(2) Nitrate assimilation
(3) Nitrification
(4) Denitrification
Ans.3
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Q157. In ecosystem, denitrification is carried by bacteria
(1) Nitrobacter
(2) Nitrosomonas
(3) Thiobacillus
(4) Nitrocystis
Ans.3
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Q158. Decomposition of organic nitrogen of dead plant and animals into ammonia is called:
(1) Ammonification
(2) N₂ fixation
(3) Nitrate assimilation
(4) Denitrification
Ans.1
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Q159. Which of the following is a free living nitrogen fixing bacteria ?
(1) Rhizobium
(2) Azotobacter
(3) Both (1) & (2)
(4) Nitrococcus
Ans.2
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Q160. Which of the following plants do not contain Rhizobium in their root nodules?
(1) Alfalfa and sweet clover
(2) Alnus and Casuarina
(3) Sweet pea and lentils
(4) Garden pea & broad bean
Ans.2
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