Question

what is central dogma of life​

Answer 1

The term "central dogma" refers to the notion that DNA is transcribed into RNA and never the reverse. RNA is then used to create protein. 

Answer 2

The central dogma of molecular biology describes the two-step process, transcription and translation, by which the information in genes flows into proteins: DNA → RNA → protein. Transcription is the synthesis of an RNA copy of a segment of DNA.