Which of the following types of protein modification involves the covalent attachment of a ubiquitin molecule to a lysine residue on the target protein?

A Phosphorylation
B Ubiquitination ✓
C Acetylation
D Glycosylation

Explanation

Ubiquitination is a type of post-translational modification that involves the covalent attachment of a ubiquitin molecule to a lysine residue on the target protein, which can mark the protein for degradation or affect its activity.

Source

Kumar et al., Biochemistry
Protein Metabolism Biochemistry Post-Translational Modification Hard NURSING Confidence: high