* Structure: They are all single-stranded nucleic acids composed of a sugar-phosphate backbone with nitrogenous bases attached. The sugar in RNA is ribose, unlike the deoxyribose found in DNA.

* Bases: They contain the same nitrogenous bases as DNA, except thymine (T) is replaced by uracil (U).

* Function: RNA molecules are involved in protein synthesis and gene expression.

* Location: RNA is found in the nucleus and cytoplasm of cells.

While these are shared characteristics, RNA comes in various forms with different functions and structures:

* Messenger RNA (mRNA): Carries genetic information from DNA to ribosomes for protein synthesis.

* Transfer RNA (tRNA): Transports amino acids to the ribosomes during protein synthesis.

* Ribosomal RNA (rRNA): Forms part of the structure of ribosomes, the protein-synthesizing machinery of the cell.

* Small nuclear RNA (snRNA): Involved in splicing, a process that removes introns from pre-mRNA.

* Small interfering RNA (siRNA) and MicroRNA (miRNA): Play a role in gene regulation by silencing gene expression.

Despite their diverse roles, all forms of RNA are crucial for the normal functioning of cells.