Which of the following statements best describes the process of ubiquitination?

• A. Ubiquitination is the process of synthesizing new proteins from amino acids.
• B. Ubiquitination is the breakdown of proteins into amino acids.
• C. Ubiquitination is the ATP-dependent covalent attachment of ubiquitin peptides to target proteins.
• D. Ubiquitination is the conversion of ATP to ADP in cellular respiration.

Answer: (C)