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Multiple Choice
Which statement best describes the relationship between starch and glucose?
A
Starch and glucose are both monosaccharides.
B
Starch is a polysaccharide composed of repeating units of glucose.
C
Glucose is a disaccharide formed by the hydrolysis of starch.
D
Glucose is a lipid derived from the breakdown of starch.
Verified step by step guidance
1
Understand the definitions of key terms: Glucose is a monosaccharide (a single sugar unit), while starch is a polysaccharide (a carbohydrate composed of many sugar units linked together).
Recognize the structural relationship: Starch is made up of repeating units of glucose molecules linked by glycosidic bonds. This makes starch a polymer of glucose.
Clarify the process of hydrolysis: When starch undergoes hydrolysis (a chemical reaction involving water), it breaks down into smaller units, eventually yielding glucose molecules.
Eliminate incorrect options: Glucose is not a disaccharide, nor is it a lipid. Starch and glucose are not both monosaccharides, as starch is a polysaccharide.
Select the correct statement: Based on the definitions and relationships, the correct answer is that starch is a polysaccharide composed of repeating units of glucose.