Question

Information flow or central dogma of modern biology is:
(A) RNA

Proteins

DNA
(B) DNA

RNA

Proteins
(C) RNA

DNA

Proteins
(D) DNA

RNA

Proteins

Answer 1

Hint: Central dogma: The fundamental tenet of molecular biology is the idea that genetic information can only move from DNA to RNA to protein or from RNA to protein directly.

Complete step by step solution:
DNA is transcribed into RNA, which is then translated into protein, best sums up the core tenet of biology. Transcription converts genetic material (DNA) into messenger RNA (RNA), which is then translated into proteins. The fundamental principle of life is best encapsulated by the process by which DNA is translated into RNA and ultimately into protein. Genetic material (DNA) is transformed by transcription into messenger RNA (RNA), which is subsequently translated into proteins.
The process by which DNA is translated into RNA and then into protein best captures the underlying principle of life. Transcription converts genetic material (DNA) into messenger RNA (RNA), which is then translated into proteins. Just that is explained by biology's fundamental tenet. It offers the fundamental framework for how genetic information travels inside cells from a DNA sequence to a protein output. Gene expression is the process through which genetic information moves from DNA to RNA to protein.
These were protein-protein, protein-RNA, and protein-DNA, respectively. This is what Crick meant when he declared that information could not leave a protein and return to the genetic code once it had been transferred from DNA. The fundamental dogma is this.

So, option (D) is correct.

Note:
 An explanation of the movement of genetic information within a biological system is the core tenet of molecular biology. Francis Crick made the initial claim in 1956.