List - I (Codes) | List - II (Codes for) |
---|---|
(A) UUU | (I) Phenylalanine |
(B) AUG | (II) Initiator codon |
(C) CUAA | (III) Terminator codon |
(D) GUU | (IV) Valine |
The very first stage of gene expression is the procedure of transcription. In this procedure, mRNA is the place where the genetic information is stored which later aids in encoding a protein. In this process, the DNA strand acts as a guide in the making of mRNA. Despite the fact that there is one exception which is adenine base pairs with uracil instead of thymine.
The transcription unit is a set of freshly combined RNA molecules that have been transcribed from DNA. The cause is to encode at least one gene. A protein that has been encoded or encrypted with a DNA transcription unit may have a coding sequence. Transcription has a lower copying fidelity rate when differentiated from DNA replication.
The procedure of transcription is enzymatically catalyzed into three steps: