20% sames more like the answer than the other three. But I'm considering that it could be 50%, but, it doesn't convince me. So, I'd say: C. 20%
Gene expression involves formation of various proteins from specific genes. The expression starts with the process of transcription where DNA is transcribed into a mRNA by enzyme RNA polymerase. Then mRNA diffuses out of the nucleus and the process of translation takes place in the ribosomes generating a polypeptide then a protein is formed. Therefore, the correct answer is transferring of information from DNA to messenger RNA (transcription).
