Carbohydrates - GCSE Biology Definition

Carbohydrates are nutrients that provide energy for the body. They are found in foods such as bread, rice, pasta, fruits, and vegetables. There are two main types: simple carbohydrates (sugars) and complex carbohydrates (starches and fibre). During digestion, carbohydrates are broken down into glucose, a sugar that cells use for energy through the process of respiration. In GCSE Biology, students learn that carbohydrates are essential for supplying energy to living organisms and play a key role in a balanced diet.