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

Source

Alberts et al. (2019) Molecular Biology of the Cell, 6th edition
Protein Metabolism Molecular Biology Protein Modification Easy MEDICAL Confidence: high