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31 Years NEET Previous Year Questions: Mineral Nutrition - 2


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25 Questions MCQ Test Biology 31 Years NEET Chapterwise Solved Papers | 31 Years NEET Previous Year Questions: Mineral Nutrition - 2

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 for NEET 2022 is part of Biology 31 Years NEET Chapterwise Solved Papers preparation. The 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 questions and answers have been prepared according to the NEET exam syllabus.The 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 below.
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31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 1

A plant requires magnesium for [2007]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 1

A plants require magnesium for chlorophyll synthesis. All four rings bind with metal atom magnesium (Mg++ ), which remain present at the center of chlorophyll molecule.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 2

The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport: [2005]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 2

Copper : Electron transfer Maintenance of carbohydrate / nitrogen balance, chlorophyll synthesis.
Iron : Electron  transport in photosynthesis and respiration development of chloroplasts, chlorophyll and other pigments, protein synthesis.
Manganese : Metabolism and photolytic evolution of oxygen.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 3

A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is [2004]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 3

 The freshwater fern Azolla harbours Anabaena (a blue green alga) in  its leaf cavities. Chlorella is simply a green alga.  Nostoc is a free living cyanobacteria involved in N2 fixation and  so is Tolypothrix.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 4

Grey spots of oat are caused by deficiency of [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 4

Grey spots of oat are caused by deficiency of Manganese(Mn).

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 5

Boron in green plants assists in [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 5

Manganese is an activator of enzymes. Copper is essential for photosynthesis. Molybdenum is a cofactor of enzymes. Boron assists in sugar transport.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 6

The major portion of the dry weight of plants comprises of    [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 6

The major portion of the dry weight of plants comprises of Carbon, hydrogen and oxygen

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 7

Which one of the following mineral elements plays an  important role in biological nitrogen fixation ? [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 7

Molybdenum is a component of nitrogenase and nitrate reductase involved during N2 fixation. Copper is essential for photosynthesis and respiration. Zinc is involved in synthesis of auxin. Manganese is activator of enzymes involved in nitrogen metabolism

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 8

The major role of minor elements inside living organisms is to act as [2003]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 8

Minor elements are those which are required by plants in very small amount. These elements have a significant role in enzyme activities (zinc activates carboxylases, carbonic anhydrase and various dehydrogenases).

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 9

Choose the correct match [2002]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 9

These are all insectivorous plants.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 10

Which aquatic fern performs nitrogen fixation? [2001]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 10

Azolla performs nitrogen fixation through its colonies of Anabaena azollae, which have the capacity to fix atmospheric nitrogen.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 11

Passive absorption of minerals depend on [2001]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 11

Roots do not spend any energy on this type of mineral  absorption. So application of a metallic inhibitor will not retard the process.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 12

Enzyme involved in nitrogen assimilation [2001]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 12

Several enzymes and intermediates are involved in nitrogen assimilation. Here we provide an overview of the important enzymes such as nitrate reductase, nitrite reductase, glutamine synthase, GOGAT, glutamate dehydrogenase, and alanine aminotransferase that are involved in nitrogen metabolism.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 13

A pair of insectivorous plants is [1999]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 13

Insectivorous plants  supplement the supply of nitrogenous food by capturing and digesting insects. Pitcher plant (Nepenthes) and bladderwort (Utricularia)  are both insectivorous plants.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 14

Which of the following is a free living aerobic nonphotosynthetic nitrogen-fixer? [1997]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 14

Rhizobium is a symbiotic nitrogen fixer. Azospirillum is a nitrogen fixing fungus and Nostoc is anaerobic.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 15

Which of the following is not caused by deficiency of mineral nutrition? [1997]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 15

Etiolation is a plant response to stimuli. When plant seeds are grown in insufficient light, either in partial or complete absence of light, the seedlings will have long, weak stems, smaller and fewer leaves because of longer internodes, and a pale yellow colour (chlorosis). This is due to a lack of chlorophyll. The plant’s increase in height helps it to reach a possible source of light faster.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 16

Which one of the following is not an essential element for plants ? [1996]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 16

Iodine is the only such element which is an essential mineral for animals but is not required by plants.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 17

Which one of the following is a micronutrient for plants? [1996]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 17

Nutrients which are required in large amounts and functioning of plant are known as macronutrients eg. Ca, Mg, N. Nutrients required in trace amounts are known as micronutrients. Manganese is a micronutrient for plants essential for synthesis of chlorophyll. It is also required for activation of enzymes of respiration and nitrogen metabolism.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 18

Which of the following can fix atmospheric nitrogen ? [1995]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 18

Anabaena is a nitrogen fixing blue-green alga composed of barrel-shaped cells held in a gelatinous matrix. So it can fix atmospheric nitrogen.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 19

The association between blue-green algae and fungi occurs in [1995]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 19

In lichens, the association between an algae and a fungus is considered to be a symbiotic one. In this association, algae provides food to fungi.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 20

Mycorrhiza is a symbiotic relationship between roots of higher plants and [1995]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 20

Symbiotic relationship between roots of higher plants and fungi is called mycorrhiza, e.g. Pinus roots associated with fungal hyphae.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 21

Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes [1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 21

Potassium is not a constituent of any enzyme but is an activator of enzymes. Potassium is an essential mineral and is found in more amounts in actively dividing cells such as of buds young leaves, root tips, etc. It has some other roles like involved in regulating stomated movement and protein synthesis.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 22

Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as[1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 22
Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as negatively charged ions
Hence (D) is the correct answer
31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 23

Minerals absorbed by roots move to the leaf through [1988]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 23

Along with water, minerals move upwards through the trachaery elements of xylem.

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 24

The plants growing in magnesium-deficient soil, but sprayed with urea would show:  [1987]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 24

Nitrogen is the constituent of amino acids, proteins, nucleic acids, nucleotides coenzymes, hexoamines etc. Deficiency of nitrogen repidly inhibits the plant growth and yellowing of the leaves (chlorosis) magnesium has the specific role in the activation of enzymes, taking part in photosynthesis, respiration. It also forms a part of the ring structure of the chlorophyll molecule. Deficiency of Mg causes chlorosis i.e., yellowing of leaves. Deficiency of both Nitrogen and Magnesium causes chlorosis (yellowing of leaves). Thus a plant growing in magnesium-deficient soil would show chlorosis inspite of being sprayed with urea (nitrogen).

31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 25

Which one of the following roles is not characteristic of an essential element? [1986]

Detailed Solution for 31 Years NEET Previous Year Questions: Mineral Nutrition - 2 - Question 25

(i) Essential elements as components of biomolecules and hence structural elements of cells.
(ii) Essential elements that are components of energy-related chemical compounds in plants.
(iii) Essential elements that activate or inhibit enzymes.
(iv) Some essential elements can alter the osmotic potential of a cell.

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