Question

Genetic information is known to be passed in all of the following directions, except:

		RNA to DNA
		DNA to DNA
		DNA to Protein
		DNA to RNA

Answer 1

Answer: DNA to protein

Explanation: First in earlier central dogma it was found that the normal path of genetic information transfer is DNA --> RNA --> Protein. In these general cases,

DNA --> DNA: Genetic information is passed on via the process of DNA replication. In this process, two DNA sequences are produced from parent DNA sequence hence passing the information to the copies produced.

DNA --> RNA: The information is passed via the process called transcription. In this process, RNA strand is synthesized from DNA sequence. This RNA sequence act as the base for the formation of protein.

RNA --> protein: This is done by the process of translation. During this process, amino acids are formed from the RNA sequence. This ultimately leads to the formation of protein.

- There are special cases also for genetic information transfer like RNA to DNA and DNA to protein (in vitro conditions).

RNA --> DNA: In this transfer of information occurs via a process called reverse transcription. This occurs in retroviruses. In this DNA is transcribed from RNA.

DNA --> Protein: Under lab in vitro conditions in a test tube direct translation of DNA to protein can occur. But this information transfer does not occur in nature naturally and only occurs in special lab conditions. Hence this option is knocked out.