**Core Concept**
Molecular chaperones are proteins that assist in the folding, assembly, and stabilization of other proteins, preventing their aggregation and misfolding. They play a crucial role in maintaining protein homeostasis within cells.

**Why the Correct Answer is Right**
The primary function of chaperones is to facilitate protein folding and prevent protein misfolding, which can lead to various diseases, including neurodegenerative disorders and cancer. Chaperones interact with nascent polypeptide chains and help them achieve their native conformation, thereby preventing the formation of aberrant protein structures. This process is essential for maintaining protein quality control and preventing protein aggregation.

**Why Each Wrong Option is Incorrect**
**Option A:** **Proteolytic degradation** is not the primary function of chaperones, although some chaperones can interact with proteases to regulate protein degradation.
**Option B:** **Protein synthesis** is the process by which proteins are synthesized, but chaperones are not involved in this process.
**Option C:** **Antioxidant activity** is not a primary function of chaperones, although some chaperones may have antioxidant properties.

**Clinical Pearl / High-Yield Fact**
Chaperones can be divided into two main categories: HSP (heat shock proteins) and non-HSP chaperones. HSPs are induced by heat shock and play a crucial role in protecting cells against protein misfolding and aggregation.

**Correct Answer: C. Protein folding and stabilization.**