Ribosomal RNA (rRNA) associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis.
Answer:
A
Explanation:
Options B,C, and D wouldn't work because they include multi-cellular organisms. These organisms are fungi, plants, and animals that have billions of cells within them. Thus, the most probable answer would be A since many bacteria are single celled.
Hope this helped :)
I am seeing it stands for ribosomal database project