Which biomolecule is primarily involved in energy storage?

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

Answer: (C)

Carbohydrates are primarily involved in energy storage because they serve as a readily accessible source of energy for living organisms. They are made up of sugar molecules, which can be quickly broken down through metabolic pathways to release energy when needed. The most common carbohydrate for energy storage is glucose, which can be stored as glycogen in animals or starch in plants. These forms allow for efficient energy storage and mobilization, ensuring that organisms can access energy during periods of activity or when energy sources are scarce.

Proteins, while they can provide energy through catabolism, mainly function as building blocks for tissues and play crucial roles in biochemical processes. Nucleic acids are primarily responsible for the storage and transmission of genetic information, not energy storage. Water, although essential for biological reactions and life itself, does not serve a role in energy storage. Therefore, carbohydrates are the correct choice as they directly serve the key function of energy storage in living systems.