* Replication is the process of copying DNA. It's how cells duplicate their genetic material before division.

* Protein formation is called translation. It's directed by mRNA (messenger RNA), not rRNA (ribosomal RNA).

* rRNA is a crucial component of ribosomes, the cellular machinery that reads mRNA and assembles amino acids into proteins.

In summary:

* Replication is about copying DNA.

* Translation is about making proteins.

* rRNA is involved in translation but does not direct it. mRNA is the molecule that carries the genetic code for proteins.