Question

During prolonged fasting, in what sequence are the following organic compounds used by the body:

• A. Carbohydrate-fat-protein
• B. Carbohydrate-protein-fat
• C. Fat-protein-carbohydrate
• D. fat-carbohydrate-protein

Answer 1

The correct option is A Carbohydrate-fat-protein

During starvation, that is when food requirement of body is not fulfilled by the ingested food, reserve carbohydrate is used first by the body and after carbohydrates, fat is used as energy and at last when carbohydrates and fats are consumed, proteins are used as a source of energy. Proteins are used at last because proteins are the main structural component of the body and the net energy produced by burning protein is less.