In eukaryotic cell architecture, which structure primarily controls the cell's activities by housing the genetic material and regulating gene expression?

• A. Mitochondrion
• B. Golgi apparatus
• C. Lysosome
• D. Nucleus

Answer: (D)

Verified step by step guidance

1. Identify the key function described in the problem: controlling the cell's activities by housing genetic material and regulating gene expression.
2. Recall that the genetic material in eukaryotic cells is DNA, which contains the instructions for protein synthesis and cell function.
3. Understand that the structure responsible for storing DNA and regulating gene expression is the nucleus.
4. Review the roles of the other organelles listed: mitochondrion (energy production), Golgi apparatus (protein modification and sorting), and lysosome (digestion and waste removal), none of which house genetic material.
5. Conclude that the nucleus is the organelle that primarily controls the cell's activities by housing genetic material and regulating gene expression.