The Flow of Biological Information Begins With

Question

The flow of biological information begins with
A) DNA replication.
B) RNA transcription.
C) mRNA translation.
D) transcriptional regulation.

Accepted Answer

The flow of biological information begins with DNA replication, the process of copying a cell's DNA prior to cell division. DNA replication is the first step in the process of gene expression, where information in the DNA sequence is transcribed into RNA and then translated into proteins. While RNA transcription and mRNA translation are important steps in gene expression, they occur after DNA replication has already taken place. Transcriptional regulation, which involves the control of gene expression at the transcriptional level, is also an important aspect of biological information flow, but it occurs after DNA replication as well.