What biological molecule is used as structural material and as an instant source of energy? A. Carbohydrates B. Proteins C. Lipids D. Nucleic acids

The biological molecule that is used as a structural material and as an instant source of energy is A. Carbohydrates.

Here's why:

1. Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen atoms. They are found in many foods and are a key part of the human diet.

2. They serve several key functions in the body, including providing energy. When you consume carbohydrates, your body breaks them down into sugars, which are absorbed into your bloodstream and used by your cells for energy.

3. In addition to providing energy, some carbohydrates also have a structural role. For example, cellulose, a type of carbohydrate found in plants, is used to build their cell walls.

4. While proteins, lipids, and nucleic acids also play crucial roles in the body, they do not serve as an instant source of energy in the same way that carbohydrates do. Proteins are primarily used for growth and repair, lipids for long-term energy storage and insulation, and nucleic acids for storing and transmitting genetic information.