Question

The process involving reversal of a dispersed amorphous state of starch to an insoluble aggregated or crystalline condition is called ________ .

• A. Gelatinization
• B. Retrogradation
• C. Syneresis
• D. Dextrinization

Hint:

Retrogradation occurs much faster at low temperatures (just above freezing) than at room temperature.
This is why storing bread in the refrigerator accelerates staling compared to storing it in a breadbox.

Answer 1

The Correct Option is B

The question asks about the process where starch reverses from a dispersed amorphous state to an insoluble aggregated or crystalline condition. This process is called Retrogradation.

1. Understanding Retrogradation: This is a phenomenon that occurs when gelatinized starch molecules begin to reassociate and form crystalline structures as they cool. This transformation results in the starch becoming less soluble and more rigid.
2. Explanation of Other Options:
   • Gelatinization: Refers to the process where starch granules absorb water and swell upon heating, resulting in a thickening effect. This is essentially the opposite of retrogradation.
   • Syneresis: The expulsion of liquid from a gel, often seen when a gel contracts. This is most commonly observed in jellies or custards.
   • Dextrinization: Involves the breakdown of starch into dextrins, typically through dry heating. It is a process different from retrogradation that affects food's flavor and color.
3. Conclusion: Since retrogradation specifically describes the recrystallization of gelatinized starch, it is the correct answer. This process can be observed in common foods such as bread when it becomes stale.