Question

The formation of intractable insoluble aggregates of amylose is referred to as ______________

(a) retrogradation

(b) saccharification

(c) liquefaction

(d) gelatinization

I have been asked this question in semester exam.

I need to ask this question from Large Scale Use of Enzyme topic in portion Large Scale Use of Enzyme in Solution of Enzyme Technology

Answer 1

The correct answer is (a) retrogradation

For explanation: The formation of intractable insoluble aggregates of amylose is referred to as retrogradation. Hence the liquefied starch must be cooled rapidly in production of glucose syrups. This process only gives rise to the skin on custard. Gelatinization involves the dissolution of nanogram-sized starch granules to form viscous suspension. Liquefaction involves partial hydrolysis of starch. Saccharification involves production of glucose and maltose by further hydrolysis.