Answer:
The correct answer would be "is part of the ribosomes that manufacture polypeptides".
rRNA (ribosomal ribonucleic acid) refers to the RNA component of the ribosome.
It is essential for the synthesis of proteins all the living organisms (unicellular or multicellular).
The rRNA associates with proteins to form large and small sub-units of the ribosome.
In prokaryotes, the large subunit consists of 50S rRNA and small subunit consists of 30S whereas in eukaryotes, the large subunit consists of 60S and small subunit consists of 40S.
The small and large subunits form the complex around the start codon of the mRNA and perform the translation.
