Which of the following types of protein modification involves the attachment 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 attachment of a ubiquitin molecule to a lysine residue on a target protein, which can mark the protein for degradation or alter its activity.

Source

Biochemistry textbooks
Protein Metabolism Biochemistry Post-Translational Modification Medium MEDICAL Confidence: high