Multiple Choice
The enzyme lactase speeds up the breakdown of lactose into which two smaller monosaccharides?
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4. Biomolecules
Carbohydrates
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Which of the following carbohydrates is not typically found in foods derived from plants?
A
Lactose
B
Starch
C
Cellulose
D
Fructose
Verified step by step guidance1
Step 1: Begin by understanding the nature of the carbohydrates listed in the problem. Lactose, starch, cellulose, and fructose are all carbohydrates, but they differ in their sources and biological roles.
Step 2: Recall that lactose is a disaccharide composed of glucose and galactose. It is commonly found in milk and dairy products, which are derived from animals, not plants.
Step 3: Starch is a polysaccharide that serves as an energy storage molecule in plants. It is commonly found in foods like potatoes, rice, and corn.
Step 4: Cellulose is another polysaccharide found in the cell walls of plants. It provides structural support and is abundant in plant-based foods like vegetables and fruits.
Step 5: Fructose is a monosaccharide commonly found in fruits and honey. It is a natural sugar derived from plants. Based on this analysis, lactose is the carbohydrate not typically found in foods derived from plants.
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