Which of the following is NOT a function of RNA?

The correct answer focuses on the role of RNA in cellular functions and its primary distinctions from DNA. While RNA indeed plays a critical role in converting genetic information from DNA into proteins and regulating gene expression, it does not serve as a long-term storage medium for hereditary information. That function is primarily associated with DNA, which holds the genetic blueprint for an organism.

RNA is involved in various processes such as messenger RNA (mRNA) carrying genetic instructions from DNA to ribosomes for protein synthesis, transfer RNA (tRNA) assisting in the translation of mRNA into amino acids, and ribosomal RNA (rRNA) forming an essential part of the ribosome structure. Additionally, some RNA molecules can have catalytic roles, aiding in biological reactions, which further highlights the diverse functions of RNA in the cell.

This crucial distinction underscores that storing hereditary information is a hallmark of DNA, making it clear why the statement regarding RNA's role in this process is not accurate.