Question

Which of the following pair is an odd pair?

• A. Chitin - Carbohydrates
• B. Pectin - Protein
• C. Steroid - Lipid
• D. Wax - Lipid

Answer 1

Answer: (B)

Pectin - Protein

Chitin is linear unbranched structural homopolysaccharide formed of $\beta$-1, 4 linked chains of acetyl glucosamine.

Steroids are lipids having four hydrocarbon rings and a long hydrocarbon side chain.

Waxes are also classified as lipids. Waxes are esters of long chain fatty acids with long chain monohydric alcohols.

Pectins are not proteins. Pectins are mucopolysaccharides that occur in plant cell walls. Pectic acid is polymer of some 100 residues of D-galacto uronate. Calcium pectate is the major component of middle lamella in plant cell wall.