Q. No.Which of the following elements does not cause both an inhibition of cell division and delay in flowering if their concentration in plants is low?
(1) N
(2) K
(3) S
(4) Mo
(1) N
(2) K
(3) S
(4) Mo
The following statements are correct except
(1) Different plants respond differently to the deficiency of the same element
(2) The deficiency of any element can cause multiple symptoms and that the same symptoms can be caused by the deficiency of other elements as well
(3) Lack of N, K, S, Mo is responsible for cell division
(4) There is a narrow range of concentration at which elements are optimum
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
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
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
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
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
The soil is enriched of dissolved ions and inorganic salts because of
(1) Raining
(2) Leaching
(3) Weathering
(4) Erosion
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
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