What is a difference between dna replication and rna transcription?

The difference is that  DNA replication copies a whole side which was stripped into two at a time then the amino acids come in and replace each protein(G,C,T,A) and make another strand for DNA to make another cell. RNA is a piece of DNA and basically its just a smaller broken up piece and instead of using G,C,T,A, RNA would use G,C,U,A.