Which of the following is a carbohydrate?

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Multiple Choice

Which of the following is a carbohydrate?

Explanation:
Carbohydrates are sugars and related molecules built from carbon, hydrogen, and oxygen in roughly a 1:2:1 ratio, often described as hydrated carbon. Glucose is a textbook example: it’s a monosaccharide with the formula C6H12O6, a simple sugar that serves as a primary energy source in cells. The other substances don’t fit this category—water is H2O, an inorganic molecule; sodium chloride is a salt (NaCl); and ethanol is an alcohol (C2H5OH) that lacks the sugar structure and repeating CH2O units.

Carbohydrates are sugars and related molecules built from carbon, hydrogen, and oxygen in roughly a 1:2:1 ratio, often described as hydrated carbon. Glucose is a textbook example: it’s a monosaccharide with the formula C6H12O6, a simple sugar that serves as a primary energy source in cells. The other substances don’t fit this category—water is H2O, an inorganic molecule; sodium chloride is a salt (NaCl); and ethanol is an alcohol (C2H5OH) that lacks the sugar structure and repeating CH2O units.

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