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Mineral Nutrition · Question 18

AIPMT 2014MCQEasy📈 Topic in 0% papers+4−1
1

Deficiency symptoms of nitrogen and potassium are visible first in

  1. senescent leaves
  2. young leaves
  3. roots
  4. buds.

Answer

(1) senescent leaves

Solution

As per NCERT, nitrogen and potassium are mobile elements; they are actively mobilised from older (senescent) tissues to younger tissues.

Their deficiency symptoms appear first in the older, senescent leaves.

Answer: (1)

Out of syllabusAIPMT 2014

Keep practising — Mineral Nutrition

2

The first stable product of fixation of atmospheric nitrogen in leguminous plants is

  1. NO3-
  2. glutamate
  3. NO2-
  4. ammonia.
Out of syllabusNEET 2013
3

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere ?

  1. Anaerobic ammonium oxidation, and denitrification
  2. Aerobic nitrate oxidation, and nitrite reduction
  3. Enteric fermentation in cattle, and nitrogen fixation by Rhizobium in root nodules of legumes
  4. Decomposition of organic nitrogen, and conversion of dinitrogen to ammonium compounds
NEET 2013 (Karnataka)
4

Which of the following elements is a constituent of biotin?

  1. Magnesium
  2. Calcium
  3. Phosphorus
  4. Sulphur
Out of syllabusNEET 2013 (Karnataka)
5

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere?

  1. Aerobic nitrate oxidation and nitrate reduction
  2. Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
  3. Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
  4. Anaerobic ammonium oxidation and denitrification
Out of syllabusNEET 2013 (Karnataka)
6

For its action, nitrogenase requires

  1. high input of energy
  2. light
  3. Mn2+
  4. super oxygen radicals
Out of syllabusAIPMT 2012 (Mains)
7

Which one of the following is wrong statement?

  1. Anabaena and Nostoc are capable of fixing nitrogen in free-living state also.
  2. Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
  3. Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins.
  4. Nitrosomonas and Nitrobacter are chemo-autotrophs.
AIPMT 2012 (Prelims)
8

Best defined function of manganese in green plants is

  1. photolysis of water
  2. Calvin cycle
  3. nitrogen fixation
  4. water absorption
Out of syllabusAIPMT 2012 (Prelims)
9

Which one of the following is correctly matched?

  1. Passive transport of nutrients – ATP
  2. Apoplast – Plasmodesmata
  3. Potassium – Readily immobilisation
  4. Bakane of rice seedlings – F. Skoog
Out of syllabusAIPMT 2012 (Prelims)
10

Which one of the following is essential for photolysis of water?

  1. Copper
  2. Manganese
  3. Boron
  4. Zinc
AIPMT 2011 (Mains)
11

Which one of the following is not an essential mineral element for plants while the remaining three are?

  1. Iron
  2. Manganese
  3. Cadmium
  4. Phosphorus
Out of syllabusAIPMT 2011 (Mains)

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