This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following is the group of proteins which are essential for the 'folding' of other proteins in a cell? 
Select and explain. 
A. Proteases, B. Chaperones, C. Proteosomes, D. Templates
B: Chaperones
Answer: B: Chaperones 
Explanation: Some proteins need to interact with various polypeptides to attain correct folded shapes. These helper peptides are called molecular chaperones. Molecular chaperones comprise a great variety of proteins that are essential for protein binding and translocation across cellular compaments, assembling multi-protein complexes, preventing aggregation, and directing mis-folded and sho-lived proteins to degradation by the proteosome. Ref: Harper's Biochemistry 26th Edition, Pages 507-508 ; Molecular Chaperones by Reginald John Ellis, R. A. Laskey, George H. Lorimer, 1993