Biology

The correct answer is A.In the cell.

The nucleus is an organelle located inside eukaryotic cells. It is typically found in the central or slightly off-center region of the cell and is surrounded by a double membrane called the nuclear envelope. The nucleus contains the cell's genetic material (DNA) and controls the cell's activities by regulating gene expression.

Here’s why the other options are incorrect:

B.In the brain: The brain is composed of cells (neurons), some of which have nuc...