Many enzymes of photosynthesis, respiration and nitrogen metabolism are activated by

  • Ca++

  • Zn++

  • Mn++

  • Oxygen

Manganese functions in

  • Splitting of water to liberate oxygen

  • Transfer of electrones through z scheme

  • Cyclic Phosphorespiration

  • Photorespiration

For the synthesis of Auxin and activation of carboxylase, which of the following ion is involved?

  • Zn++

  • Cl-

  • Ca++

  • Mn+

Copper is absorbed in

  • Cupric form

  • Cuprous form

  • CuO

  • Cu

Which of the following is not involved in redox reactions?

  • Cu++

  • Fe++

  • Cu+

  • Cl-

For the utilization of Ca++ which of the following is used?

  • B

  • Cl-

  • Mo

  • Cu

Which of the following is not associated with Boron?

  • Membrane functioning, utilization of Ca++

  • Pollen germination, uptake of Ca++

  • Cell elongation, catalase activation

  • Cell differentiation, carbohydrate translocation

Molybdenum is not a component of

  • Nitrogenase

  • Nitrate Reductase

  • Catalase

  • Both B and C

Which of the following is not responsible for anion and cation balance?

  • Na+

  • K+

  • Cl-

  • Mo++

Which of the following is not involved in water splitting reaction of photosynthesis?

  • Cl-

  • Mn++

  • Cu

  • Both A and C

Critical concentration is the concentration of

  • Any element below which plant growth is retarded but reproduction is not compromised

  • Essential element below which plant growth is retarded

  • Beneficial elements below which plant growth is retarded

  • Beneficial elements above which plant growth is retarded

The element which is present below the critical concentration?

  • Deficient

  • Efficient

  • Beneficent

  • Sufficient

The elements which are actively mobilizable within the plants and exported to young developing tissues. The deficiency is symptom is observed in

  • Both in young and old parts

  • Only in young parts

  • First in old parts

  • First in young parts

The deficiency symptoms of mobilizable substances appear first in Older parts because

  • In order to mobilize the elements to young part, the biomolecules of older parts are broken down

  • In order to mobilize the elements the older part becomes weaker

  • The work of mobilization is random and takes a lot of energy to cause it

  • All of these

The elements which are not actively mobilizable  or immobilized within the plants . The deficiency is symptom is observed in

  • Both in young and old parts

  • Only in young parts

  • First in old parts

  • First in young parts

The deficiency symptoms of how many elements will be appearing in older tissue first?

N,K,Mg,S,Ca

  • Zero

  • Three

  • Two

  • Four

The deficiency symptoms of S and Ca will appear first in

  • Both in young and old parts

  • Only in young parts

  • First in old parts

  • First in young parts

Why does S and Ca deficiency not found in older parts first?

  • As they are immobilizable

  • As they are very abundant in older parts

  • As newer parts are already deficient

  • Both A and B

The knowledge of deficiency symptoms of mobilizable and immobilizable substances actually helps in

  • Horticulture

  • Agriculture

  • Both A and B

  • Pisciculture

Chlorosis is not

  • Loss of chlorophyll

  • Leading to yellowing of leaves

  • Deficiency of elements N, K, Mg, S, Fe, Mn, Zn and Mo

  • Accumulation of mutated chlorophyll

Necrosis is not caused by deficiency of

  • Ca, K

  • Mg, Cu

  • Cu, Mg

  • K, Zn

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?

  • N

  • K

  • S

  • Mo

The following statements are correct except

  • Different plants respond differently to the deficiency of the same element

  • 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

  • Lack of N, K, S, Mo is responsible for cell division

  • 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

  • Deficient

  • Sufficient

  • Toxic

  • 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?
  • P, Q, R, S, T, U, V,
  • R, S, T, U, V, W
  • P, Q, R, S, T
  • Q, V, W

The movement of ions is usually called

  • Pressure Flow

  • Flux

  • Diffusion

  • Osmosis

Apoplast is not associated with

  • Passive flux

  • Rapid

  • Uptake of ions into the free space or outer space of cells

  • Usually has no involvement of ion channels or transmembrane proteins which function as selective pore

Symplast is not associated with

  • Active flux

  • Slow

  • Uptake of ions through the cell

  • Usually has involvement of ion channels or transmembrane proteins which function as selective pore

Xylem sap has minerals is substantiated by

  • Heavy isotope of mineral element

  • Isobar of mineral element

  • Radioisotopes of mineral elements

  • Protium labelled isotope of mineral elements

The soil is enriched of dissolved ions and inorganic salts because of

  • Raining

  • Leaching

  • Weathering

  • Erosion

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Practice Botany Quiz Questions and Answers