Question

show what you know: gene regulatio
what is the main purpose of gene regulation in a cell?
○ to change the dna sequence
○ to control which genes are turned on or off
○ to make every cell identical
○ to remove unused dna

Explanation:

• Option "To change the DNA sequence": Gene regulation does not alter the DNA sequence; it controls gene expression. Eliminate this.
• Option "To control which genes are turned on or off": This is the core of gene regulation—controlling when and where genes are expressed (turned on/off) to adapt to cellular needs.
• Option "To make every cell identical": Cells differentiate (become different) due to gene regulation, so this is incorrect. Eliminate this.
• Option "To remove unused DNA": Gene regulation does not involve removing DNA; cells have the same DNA but express different genes. Eliminate this.

Answer:

B. To control which genes are turned on or off