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Questions and Answers
What does an increase in viscosity indicate about a liquid's characteristics?
What does an increase in viscosity indicate about a liquid's characteristics?
- It contains fewer particles in suspension.
- It becomes more diluted and thinner.
- It has increased thickness or consistency. (correct)
- It experiences reduced resistance to flow.
What happens to starch granules when they are stirred after gelatinization?
What happens to starch granules when they are stirred after gelatinization?
- They completely dissolve and lose their structure.
- More swollen granules break and contribute to thickness. (correct)
- The granules float on the surface without reacting.
- They become smaller and less viscous.
Which statement best describes the process of gelatinization in starch?
Which statement best describes the process of gelatinization in starch?
- It causes granules to swell and absorb water, increasing thickness. (correct)
- It makes starch granules impermeable to water.
- It reduces the volume of starch granules permanently.
- It leads to evaporation of water, making it less thick.
What primarily causes the increase in viscosity when stirring gelatinized starch?
What primarily causes the increase in viscosity when stirring gelatinized starch?
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How is the consistency of a mixture altered after gelatinization?
How is the consistency of a mixture altered after gelatinization?
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Study Notes
Viscosity and Gelatinization
- Viscosity refers to the resistance of a substance to flow, influenced by its thickness or consistency.
- When starch is gelatinized, the starch granules swell due to heat and moisture absorption.
- Stirring gelatinized starch leads to the breaking of swollen granules.
- As granules break, they release more starch molecules into the mixture.
- The released starch molecules contribute to an increase in viscosity, making the mixture thicker.
- Understanding this process is crucial in culinary applications and food science for controlling texture and thickness in recipes.
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