Here's a breakdown:

* DNA contains the genetic code, the instructions for building and maintaining an organism.

* RNA acts as a messenger, carrying the instructions from DNA to the ribosomes, where proteins are built.

Transcription is the process by which a DNA sequence is copied into an RNA sequence. It involves the following steps:

1. Unwinding: The DNA double helix unwinds at the location of the gene to be transcribed.

2. Base pairing: An enzyme called RNA polymerase uses one strand of the DNA as a template to build a complementary RNA strand. The RNA nucleotides pair with their corresponding DNA bases (A with T, U with A, C with G, and G with C).

3. Elongation: The RNA polymerase moves along the DNA, adding more RNA nucleotides to the growing RNA strand.

4. Termination: When the RNA polymerase reaches a stop signal, the process ends and the newly synthesized RNA molecule is released.

The resulting RNA molecule is called messenger RNA (mRNA) and carries the genetic information from the DNA to the ribosomes.