What is created when a gene is expressed?

When a gene is expressed, it undergoes a process known as gene expression, which ultimately leads to the production of proteins. The first step in gene expression involves the transcription of DNA into messenger RNA (mRNA). This mRNA then goes through translation, where ribosomes read the mRNA sequence to assemble amino acids in the correct order, forming a protein.

While RNA is a crucial intermediate in this process and is directly synthesized from DNA during transcription, it is important to note that the end product of gene expression is the protein itself. Proteins perform a vast array of functions in the body, including acting as enzymes, signaling molecules, and structural components of cells.

Therefore, focusing on the entire scope of gene expression clearly reveals that proteins are the final products resulting from the process initiated by the expression of a gene.