Phosphoenol pyruvate carboxylase needs which of the following ions for activation?

  1. Zn++
  2. Mg++
  3. Mn++
  4. Ca++
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Nitrogenase needs which of the following ion for activation?

  1. Cr
  2. Mo
  3. W
  4. Sg
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Alcohol Dehydrogenase needs which of the following ion for activation?

  1. Zn++
  2. Mo
  3. Cr
  4. Mg++
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For the opening and closing of stomata which of the following ion is important?

  1. Ca++
  2. Mo
  3. Cr
  4. K+
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Nitrogen

Find the wrong one.

  1. Essential nutrient element required by plants in the greatest amount
  2. It is absorbed mainly as nitrite
  3. It is required by all parts of the plants particularly the meristematic tissue and metabolically active cells
  4. One of the major constituents of proteins, Nucleic Acid and vitamins
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Nitrogen is mainly absorbed as

  1. Nitrite
  2. Nitrate
  3. Ammonium
  4. All of these
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Which of the following form is absorbed for the requirement of Phosporus?

  1. Dihydrogen Phosphate, Hydrogen phosphate
  2. Phosphoric Acid
  3. Phosphorite
  4. Phosphic Acid
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Phosphorus is not a component of

  1. Cell membrane
  2. Certain Proteins
  3. Nucleosides
  4. Nucleotides
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Which of the following ion is required more in meristematic tissues, buds, leaves and root tips?

  1. K+
  2. Cl-
  3. P
  4. N
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Which of the following is not associated with potassium ions?

  1. Maintain anion-cation balance in cells
  2. Involved in protein synthesis
  3. Involved in opening and closing of stomata and activation of enzyme
  4. Maintenance of the turgidity of the cells and all phosphorespiration reactions
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