What is the primary function of ribosomes?

• A. Energy Production
• B. DNA Replication
• C. Protein Synthesis
• D. Lipid Synthesis

Answer: (C)

Ribosomes play a crucial role in the process of protein synthesis, often referred to as translation. They are molecular machines composed of ribosomal RNA (rRNA) and proteins, and they serve as the site where messenger RNA (mRNA) is translated into a polypeptide chain. During this process, ribosomes read the sequence of the mRNA and facilitate the assembly of amino acids in the correct order to form proteins.

The primary function of ribosomes is to connect the mRNA with transfer RNA (tRNA), which carries specific amino acids. As the ribosome moves along the mRNA, it matches the codons of the mRNA with the corresponding anticodons on the tRNA, effectively building the polypeptide based on the genetic instructions. This function is essential for the expression of genes and the production of proteins that are vital for cell structure and function.

Other cellular processes, such as energy production, DNA replication, and lipid synthesis, involve different cellular machinery and do not directly relate to the fundamental role of ribosomes in creating proteins. Thus, the primary function of ribosomes is clearly centered on protein synthesis.