Here's why:
* DNA contains the genetic code: DNA holds the instructions for building and maintaining an organism. This information is stored in the sequence of its nucleotides (adenine, guanine, cytosine, and thymine).
* Transcription is the process of copying DNA into RNA: During transcription, a specific segment of DNA (a gene) is used as a template to create a complementary RNA molecule. This RNA molecule is called messenger RNA (mRNA).
* mRNA carries the genetic code to the ribosomes: mRNA then travels out of the nucleus to the ribosomes, where it directs the synthesis of proteins.
While other structures exist within a cell, they are not capable of being transcribed into mRNA.
Let me know if you have any other questions.
