Symplast is not associated with

(1) Active flux

(2) Slow

(3) Uptake of ions through the cell

(4) Usually has involvement of ion channels or transmembrane proteins which function as selective pore

Subtopic:  Hydroponics & Aeroponics |
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Xylem sap has minerals is substantiated by

(1) Heavy isotope of mineral element

(2) Isobar of mineral element

(3) Radioisotopes of mineral elements

(4) Protium labelled isotope of mineral elements

Subtopic:  Hydroponics & Aeroponics |
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The soil is enriched of dissolved ions and inorganic salts because of

(1) Raining

(2) Leaching

(3) Weathering

(4) Erosion

Subtopic:  Introduction |
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Which of the following is not true about soil?
P. Soil not only supplies minerals but also harbours nitrogen fixing bacteria and other microbes
Q. It holds water
R. It supplies air to the roots
S. It acts as a matrix that stabilises the plant
T. It is a source of photosynthate
U. It is positively geotropic without any exception

1. S, T and U
2. T and U
3. S and U
4. R and T

Subtopic:  Introduction |
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Which of the following micronutrients does not form components of fertiliser?

(1) Cu, Mn

(2) Zn, K

(3) Fe, Cu

(4) Cu, Zn

Subtopic:  Classification of Nutrients |
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Which of the following macronutrients does not form components of fertiliser?

(1) N,P

(2) P,S

(3) K,S

(4) S,Zn

Subtopic:  Classification of Nutrients |
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Nitrogen:
Find the incorrect one.
1. Plants compete with microbes for it.
2. It is a limiting nutrient for both natural and agricultural ecosystem
3. Nitrogen has triple covalent bonds
4. Nitrogen fixation is conversion of nitrogen into nitrate

Subtopic:  Ammonia Assimilation & Nitrogen Export | Nitrogen Metabolism: 1 | Nitrogen metabolism |
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In nature, ……….. and ……….. provide enough energy to convert Nitrogen to nitrogen oxides (NO, NO2, N2O).

(1) Lightning, Forest fires

(2) Industrial combustions, UV radiation

(3) Forest fire, Lightning

(4) Lightning, UV radiation

Subtopic:  Ammonia Assimilation & Nitrogen Export | Nitrogen Metabolism: 1 | Nitrogen metabolism |
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Decomposition of organic nitrogen of dead plants and animals into ammonia is called

(1) Nitrogen Fixation

(2) Ammonification

(3) Nitrification

(4) Denitrification

Subtopic:  Ammonia Assimilation & Nitrogen Export |
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Electrical nitrogen fixation leads to

(1) Formation of Nitrate

(2) Formation of Nitrite

(3) Formation of Ammonia

(4) Formation of Nitrogen

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
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