DNA is a huge part of the human process, because this is what gives you the traits that you have and what gives instructions to certain cells to do certain processes.
MRNA is the messenger part of RNA. It is was gives instructions to the ribosomes on what type of amino acids to make.
RRNA is what reads what the MRNA says and basically translates it to the ribosomes in order for them to make it.
TRNA is the part that transports the instructions to the ribosomes to make the amino acids needed for the cell.
DNA replication is the process in which the DNA is "unzipped" by the helicase where it is then turned into RNA. After this more nucleotides come in and match up with the missing side to make 2 new strands of DNA.
Transcription is the first step of DNA replication where the DNA is actually unzipped and made into RNA. It does this in order for the ribosomes to come in and read the codons it needs in order to make the correct amino acids. This takes place in the nucleus.
Translation is located in the cytoplasm of the cell.
After the DNA unzips to form RNA the MRNA come to bring the instructions it has gotten from the codons formed after the unzipping, and brings it to the TRNA to give it to the ribosomes to make the amino acids. After it gets the instructions, it gives the MRNA an anticodon.