Question

Identify the correct match for column-I, II and III:

Column-I	Column-II	Column-III
A	Molybdenum	a	Macronutrient	i	Middle lamella
B	Zinc	b	Micronutrient	ii	Stomatal movement
C	Calcium	c	Trace element	iii	Auxin
D	Potassium	d	Macronutrient	iv	Nitrate reductase

• A. A-d-i, B-b-ii, C-a-iii, D-c-iv
• B. A-a-iv, B-d-iii, C-c-ii, D-b-i
• C. A-b-iv, B-c-iii, C-d-i, D-a-ii
• D. A-a-ii, B-b-iv, C-c-i, D-d-iii

Answer 1

The correct option is C A-b-iv, B-c-iii, C-d-i, D-a-ii

Molybdenum is a trace element or micronutrient. It is a component of several enzymes, including nitrogenase and nitrate reductase both of which participate in nitrogen metabolism.

Zinc is a micronutrient or trace element. It activates various enzymes, especially carboxylases. It is also needed in the synthesis of auxin.

Calcium is a macronutrient. During cell division it is used in the synthesis of cell wall, particularly as calcium pectate in the middle lamella.

Potassium is a macronutrient. Potassium helps to maintain an anion-cation balance in cells and is involved in opening and closing of stomata and in the maintenance of the turgidity of cells.