Any mineral ion concentration in tissues that reduces the dry weight of tissues by about 10 per cent is considered

(1) Deficient

(2) Sufficient

(3) Toxic

(4) Efficient

Subtopic:  Mineral Deficiency & Toxicity |
 77%
From NCERT
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Which of the following are symptom of Mn toxicity?
P. Appearance of brown spots surrounded by chlorotic veins
Q. Mn competes with Fe and Mg for uptake
R. Competes with Mg for binding with enzymes
S. Inhibits calcium translocation in shoot apex
T. It causes deficiency of Mg and Ca
U. It causes Chlorosis
V. It causes Necrosis
W. It causes inhibition of cell division
Which of the above are correct?
1. P, Q, R, S, T, U, V,
2. R, S, T, U, V, W
3. P, Q, R, S, T
4. Q, V, W

Subtopic:  Mineral Deficiency & Toxicity |
 57%
From NCERT
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The movement of ions is usually called

(1) Pressure Flow

(2) Flux

(3) Diffusion

(4) Osmosis

Subtopic:  Hydroponics & Aeroponics |
 91%
From NCERT
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Apoplast is

Not associated with

(1) Passive flux

(2) Rapid

(3) Uptake of ions into the free space or outer space of cells

(4) Usually has no involvement of ion channels or transmembrane proteins which function as selective pore

Subtopic:  Hydroponics & Aeroponics |
 76%
From NCERT
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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 |
 70%
From NCERT
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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 |
 77%
From NCERT
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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 |
 67%
From NCERT
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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 |
 75%
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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 |
 62%
From NCERT
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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 |
 82%
From NCERT
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