Question

Match the words in column I with the phrases in column II. Choose the answer which gives the correct combination of the alphabets of the columns.

Column I	Column II
A. Magnesium	p. Found in some amino acids
B. Sulphur	q. Not important for plants
C. Iodine	r. Structural component of chlorophyll
D. Manganese	s. Component of sugar
	t. Required for enzyme activity

• A. A- r, B- s, C- q, D- p
• B. A- r, B- p, C- q, D- s
• C. A- r, B- p, C- q, D- t
• D. A- s, B- r, C- p, D- t
• E. A- s, B- q, C- p, D- s

Answer 1

Answer: (C)

A- r, B- p, C- q, D- t

Plants require 17 essential mineral nutrients for optimum growth. The mineral required in large quantity are called as macronutrients (C, H, O, P, K, N, S, Ca, Mg), whereas minerals required in smaller quantity are called as micronutrients (Fe, M, B, Cl, Zn, Mn, Cu, Ni).

Other than these 17 essential mineral elements plants may also absorb certain nonessential minerals like iodine, gold, silver, uranium, silicon etc. from the soil.

Sulfur is required as a constituent of certain sulfur-containing amino acids, like cysteine and methionine.

Magnesium is an essential mineral component of chlorophyll. It is the central metal element coordinated to cyclic tetrapyrrole head of chlorophyll.

Manganese is required for normal activity of a number of carboxylase and oxidoreductase enzymes.

So, the correct answer is 'A- r, B- p, C- q, D- t'