What is the function of ribosomal RNA in the cell?

Ribosomal RNA (rRNA) plays a crucial role in the formation of ribosomes, which are essential structures in the cell where protein synthesis occurs. rRNA combines with proteins to create ribosomal subunits, which then come together during translation to facilitate the assembly of amino acids into polypeptides based on the sequence of messenger RNA (mRNA). This association of rRNA and proteins is vital for the overall function of the ribosome, enabling it to read the mRNA and ensure that the correct amino acids are incorporated into the growing protein chain.

The other choices do not accurately describe the primary function of rRNA. The molecule that carries amino acids to the ribosome is transfer RNA (tRNA), while the process of copying a coded message from DNA is performed by messenger RNA (mRNA). Additionally, cell division involves a complex series of processes and structures such as the mitotic spindle and centrioles, rather than being a function of rRNA. Understanding the specific role of rRNA in ribosome structure and function highlights its importance in the fundamental process of protein synthesis within the cell.