Question

Study the following combinations and identify the correct matches related to the role of essential mineral elements in plants.
(I) Sulphur - Stabilization of protein structure
(II) Manganese - Expression of apical dominance
(III) Zinc - Activation of IAA oxidase
(IV) Potassium - Maintenance of anion-cation balance in cells

• A. (II), (III)
• B. (II), (IV)
• C. (I) , (IV)
• D. (I) , (II)

Answer 1

The correct option is A (II), (III)

The major role of sulphur in plants includes components of amino acids, aid in development of enzymes and vitamins, promotion of nodule formation on legumes, helps in the formation of chlorophyll. Thus, statement I is incorrect.

Manganese functions as a part of certain enzyme systems and helps in chlorophyll synthesis and helps in the expression of apical dominance. Thus, statement II is correct.

Zinc aids in activation of indole acetic acid oxidase. Thus, statement III is the right answer.

Potassium plays a major role in translocation of starches, enhancing photosynthesis, increasing water-use efficiency, helps in protein synthesis and fruit formation, activating enzymes and its regulation and increasing disease resistance. Thus, statement IV is wrong.

Thus, the correct answer is option A.