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Questions and Answers
What is wheat starch obtained from?
Grains of Triticum vulgare
Wheat starch is characterized by its __________ condition.
powder
Which of the following describes the appearance of rice starch?
Wheat starch is soluble in water.
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Match the starch types with their corresponding characteristics:
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What is the effect of H2SO4 on wheat starch?
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How does rice starch respond to iodine?
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What is wheat starch?
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What are the physical characteristics of wheat starch?
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Wheat starch is soluble in water.
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What is the shape of wheat starch granules?
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Rice starch is obtained from ______.
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What is a physical characteristic of rice starch?
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The hilum of rice starch is always visible.
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What effect does iodine have on starch?
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What happens to starch when hot water is applied?
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Study Notes
Wheat Starch
- Origin: Polysaccharide granules sourced from triticum vulgare f: gramineae (wheat) grains.
-
Physical Characters:
- Condition: Powder
- Color: White
- Taste: Starchy
- Odor: Odorless
- Solubility: Insoluble in water
- Homogeneity: Homogenous
- Touch: Smooth
-
Microscopical Characters:
- Shape: Rounded or lenticular
- Size: Medium
- Hilum: Present (faint), centric point
- Striations: Present (distinct), concentric
- Aggregation: Mainly simple
-
Chemical Characters:
- Effects of Iodine: Blue color
- Effects of H2SO4: Charring
- Effects of hot H2O: Gelatinization forming a gel-like substance upon cooling
Rice Starch
- Origin: Polysaccharide granules made from oryza sativa f:-gramineae (rice) grains.
-
Physical Characters:
- Condition: Powder
- Color: White
- Taste: Starchy
- Odor: Odorless
- Solubility: Insoluble in water
- Homogeneity: Homogenous
- Touch: Gritty
-
Microscopical Characters:
- Shape: Polyhedral
- Size: Small
- Hilum: Invisible or absent
- Striations: Invisible or absent
- Aggregation: Mainly compound (containing more than 2 granules without a common sheath)
-
Chemical Characters:
- Effects of Iodine: Blue color
- Effects of H2SO4: Charring
- Effects of hot H2O: Gelatinization forming a gel-like substance upon cooling
Wheat Starch
- Origin: Polysaccharide granules extracted from wheat grains (Triticum vulgare, family Gramineae)
- Physical Characteristics:
- Condition: Powder
- Color: White
- Taste: Starchy
- Odor: Odorless
- Solubility: Insoluble in water
- Homogeneity: Homogenous
- Touch: Smooth
Wheat Starch - Microscopical Characteristics
- Shape: Rounded or lenticular
- Size: Medium
- Hilum: Present (faint), centric point
- Striations: Present (distinct), concentric
- Aggregation: Mainly simple
Wheat Starch - Chemical Characteristics
- Effects of Iodine: Blue color
- Effects of H2SO4: Charring
- Effects of Hot Water: Gelatinization, forming a gel-like consistency upon cooling
Rice Starch
- Origin: Polysaccharide granules made from rice grains (Oryza sativa, family Gramineae)
- Physical Characteristics:
- Condition: Powder
- Color: White
- Taste: Starchy
- Odor: Odorless
- Solubility: Insoluble in water
- Homogeneity: Homogenous
- Touch: Gritty
Rice Starch - Microscopical Characteristics
- Shape: Polyhedral
- Size: Small
- Hilum: Invisible or absent
- Striations: Invisible or absent
- Aggregation: Mainly compound (containing more than two granules without a common sheath)
Rice Starch - Chemical Characteristics
- Effects of Iodine: Blue color
- Effects of H2SO4: Charring
- Effects of Hot Water: Gelatinization, forming a gel-like consistency upon cooling
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Description
Explore the physical, microscopical, and chemical characteristics of wheat and rice starch. This quiz covers the origins, physical traits, and specific reactions of starch samples from these grains. Test your knowledge on their properties and differences.
