TeXes Science Practice Test

Which term signifies all chemical substances that an organism requires to sustain life?

1. Nutrients

2. Proteins

3. Vitamins

4. Minerals

The correct answer is: Nutrients

The term that signifies all chemical substances that an organism requires to sustain life is "nutrients." Nutrients encompass a broad range of compounds, including carbohydrates, proteins, fats, vitamins, and minerals, all of which play essential roles in supporting various biological functions. Nutrients are vital for growth, energy production, and overall health, as they provide the building blocks for cellular structures, facilitate metabolic processes, and help in the regulation of body functions. Each class of nutrient has specific roles; for example, proteins are crucial for tissue repair and enzyme function, while vitamins and minerals are necessary for metabolic processes and maintaining overall health. Although proteins, vitamins, and minerals are important components of the nutrient category, they do not represent the full spectrum of chemical substances needed for life. Therefore, referring to all these compounds collectively as nutrients is the most accurate representation of what organisms need to thrive.