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Mineral Nutrition · Question 29

AIPMT 2011 (Prelims)MCQEasy📈 Topic in 0% papers+4−1
1

Which one of the following elements in plants is not remobilised?

  1. Phosphorus
  2. Calcium
  3. Potassium
  4. Sulphur

Answer

(2) Calcium

Solution

As per NCERT, elements that are actively mobilised within the plant (nitrogen, potassium, phosphorus, sulphur, magnesium) are moved from older to younger tissues.

Elements that are structural components of the cell, like calcium (in the middle lamella as calcium pectate), are not remobilised.

Deficiency of calcium appears first in young tissues.

Answer: (2)

Out of syllabusAIPMT 2011 (Prelims)

Keep practising — Mineral Nutrition

2

Nitrifying bacteria

  1. oxidize ammonia to nitrates
  2. convert free nitrogen to nitrogen compounds
  3. convert proteins into ammonia
  4. reduce nitrates to free nitrogen
Out of syllabusAIPMT 2011 (Prelims)
3

The function of leghaemoglobin in the root nodules of legumes is

  1. inhibition of nitrogenase activity
  2. oxygen removal
  3. nodule differentiation
  4. expression of nif gene
Out of syllabusAIPMT 2011 (Prelims)
4

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?

  1. Leghaemoglobin scavenges oxygen and is pinkish in colour.
  2. Nodules act as sites for nitrogen fixation.
  3. The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3.
  4. Nitrogenase is insensitive to oxygen.
Out of syllabusAIPMT 2010 (Mains)
5

Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D. [figure]

  1. array|l|l|l|l| A & B & C & D \ Nitrification & Ammonification & Animals & Plants \ array
  2. array|l|l|l|l| A & B & C & D \ Denitrification & Ammonification & Plants & Animals \ array
  3. array|l|l|l|l| A & B & C & D \ Nitrification & Denitrification & Animals & Plants \ array
  4. array|l|l|l|l| A & B & C & D \ Denitrification & Nitrification & Plants & Animals \ array
Out of syllabusAIPMT 2010 (Mains)
6

One of the free-living, anaerobic nitrogen-fixer is

  1. Beijerinckia
  2. Rhodospirillum
  3. Rhizobium
  4. Azotobacter
AIPMT 2010 (Prelims)
7

An element playing important role in nitrogen fixation is

  1. molybdenum
  2. copper
  3. manganese
  4. zinc
Out of syllabusAIPMT 2010 (Prelims)
8

Which one of the following is not a micronutrient?

  1. Molybdenum
  2. Magnesium
  3. Zinc
  4. Boron
Out of syllabusAIPMT 2010 (Prelims)
9

Manganese is required in

  1. plant cell wall formation
  2. photolysis of water during photosynthesis
  3. chlorophyll synthesis
  4. nucleic acid synthesis
Out of syllabusAIPMT 2009
10

Nitrogen fixation in root nodules of Alnus is brought about by:

  1. Bradyrhizobium
  2. Frankia
  3. Clostridium
  4. Azorhizobium
AIPMT 2008
11

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism?

  1. Crotalaria juncea
  2. Cycas revoluta
  3. Cicer arietinum
  4. Casuarina equisetifolia
AIPMT 2007

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