Final answer:
Around 90-95% of poly A+ RNAs in eukaryotic cells are noncoding.
Step-by-step explanation:
The percentage of noncoding poly A+ RNAs can vary depending on the organism and cell type. However, it is estimated that around 90-95% of poly A+ RNAs in eukaryotic cells are noncoding. These noncoding RNAs have diverse functions, such as regulating gene expression, organizing chromatin structure, and controlling cell development.