This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
Folding protein are 
Select and explain. 
A. GLUT-1, B. Calnexin, C. Cytochrome 450, D. Insulin receptor
B: Calnexin
Answer: B: Calnexin 
Explanation: Calnexin is a chaperone, characterized by assisting protein folding and quality control, ensuring that only properly folded and assembled proteins proceed fuher along the secretory pathway.Ref: Harper&;s Illustrated Biochemistry, 26th edition, page no: 508