MCQ Detailed View

Carbohydrates are the body’s main and fastest source of energy. They are found in foods like rice, wheat, bread, fruits, and vegetables. When we eat carbohydrates, the body breaks them down into simple sugars, mainly glucose, which is absorbed into the bloodstream. Glucose is then used by cells to produce energy in the form of ATP (adenosine triphosphate), which powers all body functions, from moving muscles to thinking in the brain.

Carbohydrates provide quick energy because they are easily digested and absorbed. For example, eating a banana or a slice of bread gives almost immediate energy for activities like running, studying, or working. In contrast, fats provide long-term energy, and proteins are mainly used for growth, repair, and other vital functions, not rapid energy supply.

Other nutrients like minerals and vitamins are essential for health, but they do not supply energy directly. Minerals support body structure and enzyme functions, while vitamins regulate metabolism and immunity.

Understanding carbohydrates as a major source of quick energy is a key concept in biology, particularly in human nutrition and metabolism. It explains why athletes, students, and workers consume carbohydrate-rich foods before physical or mental activities. It also highlights the importance of a balanced diet to maintain steady energy levels throughout the day.

In short, carbohydrates are the nutrient that provides the body with rapid energy, helping perform daily activities efficiently.