Which of the following is an example of carbohydrates?

Carbohydrates are one of the four main types of macromolecules essential for life, and they are primarily composed of carbon, hydrogen, and oxygen atoms. Glucose is a simple sugar, classified as a monosaccharide, which is a key energy source for living organisms and a fundamental unit of carbohydrates. It plays a vital role in cellular respiration, where it is broken down to produce energy.

In contrast, proteins are made up of amino acids and are essential for various bodily functions, including building and repairing tissues. Lipids, such as fats and oils, are primarily involved in energy storage, insulation, and cellular structure but are not classified as carbohydrates. Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information and also do not fall under the carbohydrate category. This distinction highlights why glucose stands out as the correct example of a carbohydrate, while the other options represent different classes of biological macromolecules.