Sugars and starches that provide quick energy

• A. Nucleic acids
• B. Lipids
• C. Proteins
• D. Carbohydrates

Answer: (D)

Carbohydrates are a rapid source of energy because they’re readily broken down into glucose, the body’s immediate fuel. Sugars, the simple forms, are digested and absorbed quickly, causing a rapid rise in blood glucose that can be used right away to generate ATP through glycolysis. Starches, though composed of longer glucose chains, are broken down into glucose as well, providing energy promptly and more steadily than fats but faster than proteins. In contrast, nucleic acids are for genetic information, lipids store energy but release it more slowly, and proteins mainly serve as building blocks for tissues and enzymes (and only provide energy when other sources are scarce). So sugars and starches describe the carbohydrate category that supplies quick energy.