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Mineral Nutrition · Question 12

NEET 2018MCQEasy📈 Topic in 25% papers+4−1
1

In which of the following forms is iron absorbed by plants?

  1. Ferrous
  2. Both ferric and ferrous
  3. Ferric
  4. Free element

Answer

(3) Ferric

Solution

As per NCERT, iron is obtained by plants in the form of ferric ions ( Fe3+). It is required in larger amounts than other micronutrients and is an important constituent of proteins involved in electron transfer, like ferredoxin and cytochromes.

Answer: (3)

Out of syllabusNEET 2018

Keep practising — Mineral Nutrition

2

In which of the following all three are macronutrients?

  1. Molybdenum, magnesium, manganese
  2. Nitrogen, phosphorus, sulphur
  3. Boron, Zinc, manganese
  4. Iron, copper, molybdenum
Out of syllabusNEET 2016 (Phase 1)
3

Which is essential for the growth of root tip?

  1. Zn
  2. Fe
  3. Ca
  4. Mn
Out of syllabusNEET 2016 (Phase 2)
4

The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

  1. Magnesium and Molybdenum
  2. Magnesium and Chlorine
  3. Manganese and chlorine
  4. Manganese and Potassium
Out of syllabusAIPMT 2015
5

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by

  1. carotene
  2. cytochrome
  3. leghaemoglobin
  4. xanthophyll.
Out of syllabusAIPMT 2015
6

Minerals known to be required in large amounts for plant growth include

  1. potassium, phosphorus, selenium, boron
  2. magnesium, sulphur, iron, zinc
  3. phosphorus, potassium, sulphur, calcium
  4. calcium, magnesium, manganese, copper.
Out of syllabusAIPMT 2015 (Cancelled)
7

Deficiency symptoms of nitrogen and potassium are visible first in

  1. senescent leaves
  2. young leaves
  3. roots
  4. buds.
Out of syllabusAIPMT 2014
8

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
9

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)
10

Which of the following elements is a constituent of biotin?

  1. Magnesium
  2. Calcium
  3. Phosphorus
  4. Sulphur
Out of syllabusNEET 2013 (Karnataka)
11

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)

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