Identify the incorrectly matched pair

    Mineral                     Functions in plants

1. Potassium                 Opening and closing of stomata, Activation of enzymes

2 Magnesium                 Maintenance of ribosome structure, Structure of chlorophyll

3 Boron                         Pollen germination, Carbohydrate translocation

4 Molybdenum               Water splitting in photosynthesis, Nitrogen metabolism

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How many ATP molecules are required to biologically fix one molecule of nitrogen into two molecules of ammonia?
1. 4
2. 8
3. 12
4. 16

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When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are:
1. yellowish leaves
2. colourless petiole
3. dark green leaves
4. shoot apex die.

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Select the mismatch.

(a) Frankia                       Alnus

(b) Rhodospirillium            Mycorrhiza

(c) Anabaena                   Nitrogen fixer

(d) Rhizobium                  Alfa-fa

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Which is essential for the growth of root tip?
(a) Zn
(b) Fe
(c) Ca
(d) Mn

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In which of the following, all three are macronutrients?
(a) Iron, copper, molybdenum
(b) Molybdenum, magnesium, manganese
(c) Nitrogen, magnesium, phosphorus
(d) Boron, zinc, manganese

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

(1) leghaemoglobin

(2) xanthophyll

(3) carotene

(4) cytochrome

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Minerals known to be required in large amounts for plant growth include
(a) Phosphorus, potassium, sulphur, calcium
(b) calcium, magnesium, manganese, copper
(c) potassium, phosphorus, selenium, boron
(d) magnessium, sulphur, iron, zinc

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Deficiency symptoms of nitrogen and potassium are visible first in

(a) senescent leaves

(b) young leaves

(c) roots

(d) buds

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The most abundant intracellular cation is

(a) Na+

(b) Ca2+

(c) H+

(d) K+

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