Which of the following is primarily used for immediate fuel and is converted to glucose?

Carbohydrates are primarily used for immediate energy and are readily converted into glucose. Glucose serves as a quick source of energy for the body's cells, making carbohydrates the body’s preferred fuel source, especially during high-intensity activities. When you consume carbohydrates, your body breaks them down into glucose, which can be used directly for energy or stored as glycogen in the liver and muscles for later use.

Fats are a concentrated source of energy, but they take longer to metabolize and are not as quickly available for immediate energy needs. Proteins can be used for energy, but their primary roles in the body involve building and repairing tissues, producing enzymes, and supporting immune function. Minerals do not provide energy; instead, they are essential for various physiological functions, including enzyme activities and maintaining fluid balance. Therefore, carbohydrates are the optimal choice for immediate fuel needs due to their efficient conversion to glucose.