Match the following columns:

Column I	Column II
a. Magnesium	1. Found in middle lamella
b. Sulphur	2. A structural component of chlorophyll
c. Calcium	3. Required for enzymatic activity
d. Manganese	4. Found in some amino acids

Solution(By Examveda Team)

a. Magnesium is a structural component of chlorophyll. The chlorophyll molecule consists of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon-hydrogen side chain, known as a phytol chain.
b. Sulphur is found in some amino acids. Methionine, cysteine, homocysteine, and taurine are the 4 common sulfur-containing amino acids.
c. Calcium is found in the middle lamella. The middle lamella is a layer that cements together the primary cell walls of two adjoining plant cells. The middle lamella is made up of calcium and magnesium pectate.
d. Manganese is required for enzymatic activity. Manganese (Mn) is an essential element that is involved in the synthesis and activation of many enzymes and the regulation of the metabolism of glucose and lipids in humans.