Respuesta :
Answer:
b. gene expression is regulated
Explanation:
Several mechanisms exist in the cell which regulate the turning on or turning off of certain genes.
These mechanisms are collectively referred to as gene regulation. The regulation can occur in several ways, including;
- Structural and chemical changes to genetic materials in the cell.
- Regulation of transcription process.
- Regulation of mRNA translation or protein synthesis
The correct option is b.