An apple is composed primarily of which type of carbohydrate?

• A. Lactose
• B. Glycogen
• C. Fructose
• D. Cellulose

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the types of carbohydrates listed in the problem. Lactose is a disaccharide found in milk, glycogen is a storage polysaccharide in animals, fructose is a monosaccharide commonly found in fruits, and cellulose is a polysaccharide that forms the structural component of plant cell walls.
2. Step 2: Recall that apples are fruits, and fruits typically contain simple sugars like fructose, which is a monosaccharide.
3. Step 3: Eliminate options that are not relevant to fruits. Lactose is found in dairy products, glycogen is stored in animal cells, and cellulose is a structural carbohydrate, not a primary energy source in fruits.
4. Step 4: Focus on fructose, which is known as the 'fruit sugar' and is the primary carbohydrate found in apples and other fruits.
5. Step 5: Conclude that the correct answer is fructose, as it aligns with the composition of carbohydrates in fruits like apples.