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Mineral Nutrition Test - 70

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Mineral Nutrition Test - 70
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following plant will show presence of roots nodules?
    Solution
    Root nodules are the characteristic features of the plants belonging to the family Fabaceae. These nodules are formed due to the symbiotic association of Rhizobium bacteria. Paes (Pisum sativum) belongs to Fabaceae.
    Hence, the correct answer is 'Peas'
  • Question 2
    1 / -0
    You notice that the young leaves of your tomato plants are very yellow. what type of deficiency does this suggest?
    Solution
    Due to nitrogen deficiency the leaves of plants become chlorotic as they are not able to synthesize sufficient chlorophyll. Due to this the leaves turn pale yellow or yellow in colour. 
    So, the correct option is 'Nitrogen'.
  • Question 3
    1 / -0
    Which of the following is a product of reductive amination?
    Solution
    Reductive amination is a type of amination reaction in which conversion of the carbonyl group to amine takes place via imine intermediate formation. So clearly out of the four compounds given only Glutamine is having amine group as its functional group others are not having amine group. So clearly, only glutamine can only be the product of reductive amination out of four.
    So, the correct answer is 'Glutamine'.
  • Question 4
    1 / -0
    Seeds sown deep in soil fail to germinate because 
    Solution
    In seeds food is stored in the form of lipids, so, initially, seeds don't need sunlight for germination. Seeds just need oxygen and water. oxygen to start the respiration so the seedling break surface of the soil to germinate. Too deep, no oxygen and seed fail to germinate.
    So, the correct answer is 'They don't get air'.
  • Question 5
    1 / -0
    Which of the following non essential element helps to maintain an anion and cation balance in cells?
    Solution
    Sodium is an non-essential element that helps maintain anion and cation balance in the cell
    So, the correct answer is 'Sodium'
  • Question 6
    1 / -0
    Ammonia produced following nitrogen fixation is incorporated into amino acids as the?
    Solution
    Nitrogen fixation is the process of conversion of inert atmospheric nitrogen into utilisation compounds of nitrogen like nitrate, ammonia, etc. Conversion of ammonia generated from nitrate assimilation or photorespiration into amino acid via primary and alternative pathways. Ammonia is then incorporated into amino acids as amino group and help in the assimilation of nitrogen. 
    So the correct answer is 'Amino group'.
  • Question 7
    1 / -0
    'Whip-tail' disease in cauliflower is noted due to deficiency of
    Solution
    Whiptail disease is caused due to deficiency of molybdenum in soil. In young plants the symptoms of whiptail disease are chlorosis of leaf margins (the whole leaves may turn white) and the leaf blades do not develop properly. When the deficiency is severe, only the midribs develop.
    So, the correct option is 'molybdenum'.
  • Question 8
    1 / -0
    Statements regarding Frankia are correct except:
  • Question 9
    1 / -0
    Gray spots of Oat are caused by deficiency of:
    Solution
    Grey spots of Oats is caused by Manganese deficiency. In oats, Mn deficiency produces a condition called 'grey speck' with occurs in patches. Oats become pale green and young leaves have spots or lesions of grey/brown necrotic tissue with orange margins.
    So, the correct option is 'Mn'.
  • Question 10
    1 / -0
    Criterion of essentiality is applicable to
    Solution
    The criteria for the essentiality of an element are given below:
    (a) The element must be absolutely necessary for supporting normal growth and reproduction. In the absence of the element, the plants do not complete their life cycle or set the seeds.
    (b) The requirement of the element must be specific and not replaceable by another element. In other words, deficiency of any one element cannot be met by supplying some other element.
    (c) The element must be directly involved in the metabolism of the plant. 

    Based on these criteria, only 17 elements has been considered essential for plants. They are grouped as micro and macro nutrients based on their quantitative requirements. 
    Macronutrients are generally present in plant tissues in large amounts (in excess of 10 mmole Kg –1 of dry matter).  The macronutrients include carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, potassium, calcium and magnesium. Of these, carbon, hydrogen and oxygen are mainly obtained from CO2 and H2O, while the others are absorbed from the soil as mineral nutrition.
    Micronutrients or trace elements are needed in very small amounts (less than 10 mmole Kg –1 of dry matter). These include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel. In addition to the 17 essential elements named above, there are some beneficial elements such as sodium, silicon, cobalt and selenium. They are required by higher plants.
    So, the correct option is 'Both micro-and mactonutrients'.

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