Texas FFA Livestock Judging PracticeTest

Which of the following is not a component of a carbohydrate?

1. Carbon

2. Hydrogen

3. Oxygen

4. Nitrogen

The correct answer is: Nitrogen

Carbohydrates are organic compounds primarily found in foods and consist of three main elements: carbon, hydrogen, and oxygen. The typical formula for a carbohydrate can be represented as Cn(H2O)n, indicating that for every carbon atom, there is generally an equal number of water molecules, signifying the presence of both hydrogen and oxygen. Nitrogen, however, is not a component of carbohydrates. It is primarily found in proteins and nucleic acids, but not in carbohydrate structures. Therefore, identifying nitrogen as the element that does not belong to the carbohydrate group is correct. Understanding the basic structure of carbohydrates allows us to differentiate them from other macromolecules where nitrogen plays an essential role.