Q21. Choose the odd one wrt macronutrients
(1) Potassium
(2) Calcium
(3) Phosphorus
(4) Manganese
Ans.4
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Q22. Which of the following is not the criteria for essentiality of a mineral element?
(1) The element must not be absolutely necessary for normal plant growth and development
(2) The element should not be replaceable
(3) The element should be directly involved in metabolism
(4) In the absence of the element, the plant does not complete its life cycle or set seeds
Ans.1
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Q23. The first phase of mineral uptake during influx
(l) Involves apoplast
(ll) Occurs through lon-channels
(lll) Is a rapid process
(1) Only (l) & (ll) are correct
(2) Only (l) & (III) are correct
(3) Only (ll) & (lll) are correct
(4) All are correct
Ans.4
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Q24. The second phase of mineral ions movement during influx is
(1) Apoplast and passive
(2) Symplast and rapid
(3) Symplast and active
(4) Apoplast and slow
Ans.3
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Q25. Best defined function of Manganese is
(1) Maintenance of turgidity of cell
(2) Formation of chlorophyll
(3) Cell differentiation
(4) Splitting of water during photosynthes
Ans.4
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Q26. Choose the Incorrect statement w. Mn-toxicity
(1) Mn-toxicity in plant decreases fresh weight of plant by 10%
(2) Mn-competes with Fe and Mg for uptake
(3) Mn-competes with Mg for binding with enzymes
(4) Mn-inhibits Ca translocation to shoot apex
Ans.1
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Q27. The concentration of the essential element below. which plant growth is retarded is termed as
(1) Toxic concentration
(2) Critical concentration
(3) Minimum concentration
(4) Essential concentration
Ans.2
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Q28. The enzyme exclusively present in prokaryotes and capable of nitrogen reduction is
(1) Nitrogenase
(2) Leghaemoglobin
(3) Nitrite reductase
(4) Carboxylase
Ans.1
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Q29. How many ATP are required for production of 10 NH3 molecules in biological nitrogen fixation?
(1) 160 (2) 40
(4) 16 (4) 14
Ans.3
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Q30. Which of the following amino acid can give rise to other amino acids by transamination?
(1) Glutamic acid
(2) Aspartic acid
(3) a-Ketoglutaric acid
(4) Tryptophan
Ans.1
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