Question

In negative control, a gene is switched off when ________. lactose is transported into the cell a regulatory protein is removed from DNA and shuts down transcription a kinase adds a phosphate to DNA a regulatory protein binds to DNA and shuts down transcription

Answer 1

Answer: a regulatory protein binds to DNA and shuts down transcription

Step-by-step explanation:

Cells have the ability to control their level of gene expression, known as gene regulation. This is a process where genes can be turned on and of (like a kitchen tap) to ensure that genes are expressed at the right time and are the right genes being "created."

For example, a regulatory protein will bind to the DNA's promoter region to stop transcription. This expression prevents any further production of mRNA (messenger RNA).