What is the primary function of the biochemical process known as ubiquitination?

A To synthesize proteins
B To degrade damaged or misfolded proteins ✓
C To regulate gene expression
D To facilitate cell signaling

Explanation

Ubiquitination is a post-translational modification that marks proteins for degradation by the proteasome, helping to remove damaged or misfolded proteins from the cell.

Mnemonic

Ubiquitin = 'ubiquitous' protein tag for degradation

Source

Alberts et al., Molecular Biology of the Cell
Fundamentals of Biochemistry Biochemistry Protein Degradation Medium MEDICAL Confidence: high