Massachusetts Comprehensive Assessment System (MCAS) Biology Practice Test

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Prepare for the Massachusetts Comprehensive Assessment System (MCAS) Biology Test. Ace your exam with flashcards and multiple-choice questions, all with helpful hints and explanations. Start studying today!

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Which type of organic molecule is fructose classified as?

Protein
Carbohydrate
Lipid
Nucleic acid

The correct answer is: Carbohydrate

Fructose is classified as a carbohydrate because it is a simple sugar, specifically a monosaccharide. Monosaccharides are the most basic form of carbohydrates, consisting of single sugar units that serve as fundamental building blocks for more complex carbohydrates. Fructose, with the chemical formula C6H12O6, is found in many plants and is particularly abundant in fruits, where it plays a key role in providing energy. In the broader context of carbohydrates, they can be categorized into three main types: monosaccharides (like glucose and fructose), disaccharides (such as sucrose and lactose), and polysaccharides (like starch and glycogen). This classification underscores the importance of fructose as part of the carbohydrate family, which is essential for energy storage and supply in living organisms.