This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'Protein folding is done by: \nSelect and explain. \nA. Chaperone, B. Endoplasmic reticulum, C. Peroxisome, D. Lysosome', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans (a) ChaperoneRef; Harper's Biochemistry, 26th ed. pg. 36-37* Chaperone proteins participate in the folding of over half of mammalian proteins. The hsp70 (70-kDa heat shock protein) family of chaperones binds short sequences of hydrophobic amino acids in newly synthesized polypeptides, shielding them front solvent.", 'role': 'assistant'}]