**Core Concept**
Ribosomes are complex cellular organelles responsible for protein synthesis in eukaryotic and prokaryotic cells. They consist of two subunits, the large and small subunits, which combine to form the complete ribosome.

**Why the Correct Answer is Right**
Protein synthesis occurs on ribosomes, where messenger RNA (mRNA) is translated into a specific sequence of amino acids. The small subunit of the ribosome reads the mRNA sequence, while the large subunit assembles the amino acids into a polypeptide chain. This process is essential for the production of proteins, which perform various cellular functions. The ribosome's ability to read the mRNA sequence is facilitated by transfer RNA (tRNA), which brings the correct amino acid to the ribosome based on the codon sequence.

**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable (no information provided)
**Option B:** This option is not relevant to the function of ribosomes in protein synthesis.
**Option C:** This option may be related to other cellular organelles, but it is not accurate regarding ribosomes.

**Clinical Pearl / High-Yield Fact**
Ribosomes are essential for protein synthesis, and their dysfunction can lead to various diseases, including genetic disorders and cancer. Understanding ribosome function is crucial for the development of targeted therapies.

**Correct Answer:** Not provided, please provide the correct answer for the question.