What typically happens to a gene to turn it on A the gene is

What typically happens to a gene to turn it on?

A. the gene is transported out of the nucleus through a nuclear pore.

B. a protein molecule binds to the gene.

C. the gene’s position gets flipped around on the chromosome.

D. a nerve sends a signal to the gene.

E. the gene is detached from the chromosome.

Solution

Answer is option B. a protein molecule binds to the gene.

Gene regulation can happen by various mechanisms and at various locations. But the most common is that the signals from the environment or from other cells activate proteins called transcription factors. These proteins bind to regulatory regions of a gene and increase or decrease the level of transcription which results in on or off of a gene.