Answer
Yes, the word "dogma" is appropriate here.
Work Step by Step
The definition of dogma is: a principle or set of principles laid down by an authority as incontrovertibly true.
In regards to how genetic information flows from DNA to RNA to protein, the process has been discovered, proven, and verified by many scientist and is today taught in classrooms around the world. If it had not been "incontrovertibly true", then it would not be taught around the world or accepted by all scientists.
