Which of the following biomolecules is composed of amino acids?

Proteins are biomolecules that are composed of long chains of amino acids, which are the building blocks of protein. Amino acids are organic compounds that contain both amino (-NH2) and carboxyl (-COOH) functional groups, along with a unique side chain that varies among different amino acids. The sequence and arrangement of these amino acids determine the structure and function of a protein, playing critical roles in various biological processes such as catalysis (as enzymes), transport, signaling, and structural support.

Carbohydrates consist primarily of carbon, hydrogen, and oxygen, and are typically made up of sugar molecules. They serve as a primary energy source and structural components in organisms but do not include amino acids in their structure.

Lipids, which include fats and oils, are hydrophobic molecules that primarily consist of fatty acids and glycerol. They are involved in energy storage, membrane structure, and signaling, rather than being made up of amino acids.

Nucleotides are the building blocks of nucleic acids, such as DNA and RNA. They consist of a sugar, a phosphate group, and a nitrogenous base. While vital for storing and transmitting genetic information, they do not relate to amino acids as their component parts.

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