The best explanation for how a gene is expressed to make a protein is option A) The instructions in DNA are used to produce an RNA molecule that is used to build a protein at the ribosome.
How a gene is expressed to make a protein?
Translation and transcription are the two main processes. Gene expression is the combined term for transcription and translation. The information contained in a gene's DNA is transferred to a molecule called RNA (ribonucleic acid) in the cell nucleus during the transcription process.
The process of creating an RNA copy of a gene's DNA sequence is known as transcription in the context of genomics. The messenger RNA (mRNA) copy carries the DNA-encoded protein information of the gene.