What is the role of peptidylprolyl cis-trans isomerase in protein metabolism?

A It catalyzes the hydrolysis of peptide bonds
B It facilitates the folding of proteins by catalyzing the cis-trans isomerization of peptidylprolyl bonds ✓
C It inhibits the activity of proteases
D It stimulates the transcription of genes involved in protein synthesis

Explanation

Peptidylprolyl cis-trans isomerase plays a crucial role in protein folding by catalyzing the cis-trans isomerization of peptidylprolyl bonds, which helps in the proper folding of proteins.

Source

Alberts et al. (2002) - Molecular Biology of the Cell
Protein Metabolism Biochemistry Protein Folding Hard MEDICAL Confidence: high