Which of the following is an example of carbohydrates?

Carbohydrates are one of the main macromolecules essential for living organisms, primarily serving as a source of energy. Glucose is a simple sugar and a fundamental carbohydrate that plays a crucial role in the metabolism of cells. It is one of the primary products of photosynthesis, which plants use to create energy. In animals, glucose is significant as it is utilized for energy production and is essential for cellular respiration.

Proteins, lipids, and nucleic acids, while vital for various biological functions, belong to different categories of macromolecules. Proteins are made up of amino acids and are integral for building tissues, enzymes, and hormones. Lipids, which include fats and oils, are important for energy storage, cellular structure, and signaling processes. Nucleic acids, such as DNA and RNA, are crucial for genetic information storage and transfer. Therefore, glucose distinctly fits the category of carbohydrates due to its chemical structure and biological role.