TRNA mRNA rRNA real simple question?

DNA gets copied by RNA polymerase to form mRNA in a process called transcription. mRNA then goes to the cytoplasm to attach to ribosomes and produce proteins in a process called translation. Ribosomes are made of rRNA and proteins. tRNA are the molecules that read the codon to know which amino acids to attach. There is one tRNA for every amino acid which is stuck at one end. There are also other types of RNA but I guess that's not important right now. Each mRNA comes from a gene and codes for a protein.