Question

Which of the enzyme acts on elimination reaction which releases oligosaccharides with non-reducing terminal 4-deoxymethyl-a-D-galact-4-enuronosyl residues?

(a) Pectin lyase

(b) Cellulase

(c) Hemicellulase

(d) Pectinesterase

The question was posed to me in exam.

The above asked question is from Large Scale Use of Enzyme in division Large Scale Use of Enzyme in Solution of Enzyme Technology

Answer 1

Correct answer is (a) Pectin lyase

Easiest explanation: Pectin lyase acts on elimination reaction which releases oligosaccharides with non-reducing terminal 4-deoxymethyl-a-D-galact-4-enuronosyl residues. These enzymes cleave pectin without the necessity of pectin methyl esterase action. Pectin lyase cleaves the pectin without the necessity of pectin methyl esterase action. Hemicellulase is a mixture of hydrolytic enzymes. Pectinesterase releases methanol from the pectyl methyl esters.