Question

Match the columns:

I	II
(A) Magnesium	(i) Found in middle lamella
(B) Sulphur	(ii) A structural component of chlorophyll
(C) Calcium	(iii) Required for enzyme activity
(D) Iodine	(iv) Found in some amino acids
(E) Manganese	(v) A component of sugars
	(vi) Not important for plants

• A. A-(ii), B-(iv), C-(i), D-(vi), E-(iii)
• B. A-(ii), B-(iv), C-(v), D-(vi), E-(iii)
• C. A-(ii), B-(vi), C-(i), D-(iv), E-(iii)
• D. A-(iii), B-(iv), C-(i), D-(vi), E-(ii)

Answer 1

The correct option is A A-(ii), B-(iv), C-(i), D-(vi), E-(iii)

(A) Magnesium - Magnesium is a constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure.

(B) Sulphur- Sulphur is present in two amino acids – cysteine and methionine and is the main constituent of several coenzymes, vitamins (thiamine, biotin, coenzyme A) and ferredoxin.

(C) Calcium - During cell division, it is used in the synthesis of cell wall, particularly as calcium pectate in the middle lamella. It is also needed during the formation of mitotic spindle.

(D) Iodine – It is non-essential element and is not important for plants.

(E) Manganese - It activates many enzymes involved in photosynthesis, respiration and nitrogen metabolism. The best defined function of manganese is in the splitting of water to liberate oxygen during photosynthesis.