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

A Phosphorylation
B Ubiquitination ✓
C Acetylation
D Glycosylation

Explanation

Ubiquitination is a type of post-translational modification that involves the addition of a ubiquitin molecule to a lysine residue on a target protein, often marking it for degradation by the proteasome.

Source

Berg et al., Biochemistry
Protein Metabolism Biochemistry Post-Translational Modification Medium MEDICAL Confidence: high