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Questions and Answers
What is the purpose of the iodine test?
What is the purpose of the iodine test?
- To detect the presence of protein
- To detect the presence of sugar
- To detect the presence of starch (correct)
- To detect the presence of fat
What color does the iodine-iodide mixture turn when it interacts with helical amylose in the presence of starch?
What color does the iodine-iodide mixture turn when it interacts with helical amylose in the presence of starch?
- Deep blue (correct)
- Red
- Light orange-brown
- Green
Which two components make up the starch, a plant carbohydrate?
Which two components make up the starch, a plant carbohydrate?
- Glucose and fructose
- Amylose and amylopectin (correct)
- Cellulose and hemicellulose
- Maltose and sucrose
What color does the iodine-iodide mixture have in an aqueous solution?
What color does the iodine-iodide mixture have in an aqueous solution?
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Which type of polysaccharide is amylopectin?
Which type of polysaccharide is amylopectin?
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Study Notes
Starch and Iodine Test
- The purpose of the iodine test is to detect the presence of starch in a substance.
Composition of Starch
- Starch, a plant carbohydrate, consists of two components: amylose and amylopectin.
Iodine Test Reaction
- When iodine-iodide mixture interacts with helical amylose in the presence of starch, it turns blue-black in color.
Characteristics of Iodine-Iodide Mixture
- In an aqueous solution, the iodine-iodide mixture has a brown color.
Type of Polysaccharide
- Amylopectin is a type of branched polysaccharide.
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