Which description is given for the nucleus in the material?

• A. The dense, active protoplasm found in the center of the cell.
• B. The outer protective layer of the cell.
• C. The fluid inside the cell membrane.
• D. The organelle that stores genetic material.

Answer: (A)

The key idea here is how this material describes the nucleus: as the dense, active mass of protoplasm located at the center of the cell. This wording emphasizes the nucleus as the compact, energetically functioning core that governs the cell’s activities. The description aligns with a traditional view that highlights the nucleus’s central position and its active role, rather than just its content. Other parts of the cell are described by their separate roles: the outer protective layer is the cell membrane, and the fluid inside the cell membrane is the cytoplasm. The nucleus is also known for storing genetic material, but in this context the central, dense description is the defining image used.