Molecular chaperones are specialized proteins that assist in the proper folding of other proteins within cells. They help prevent misfolding and aggregation, which can lead to cellular dysfunction and diseases. By providing a protective environment, molecular chaperones ensure that proteins achieve their correct three-dimensional structures. These chaperones can also aid in the refolding of damaged proteins and assist in the transport of proteins across cellular membranes. Examples of molecular chaperones include heat shock proteins and chaperonins, which play crucial roles in maintaining cellular health and function under stress conditions.