Question

The cell nucleus was discovered by

• A. Robert Hooke
• B. Robert Brown
• C. A.V. Leeuwenhoek
• D. Virchow

Answer 1

The correct option is B

Robert Brown

The correct option is B.

Explanation of the correct option:

1. The cell nucleus is the brain or director of the cell as it regulates all the functions of the cell and cell organelles.
2. It is present in the center of the animal cell and at the periphery of plants cell.
3. It has genetic material which transfers the characteristics of the parents to the next generation.
4. Robert Brown discovered the nucleus in 1831 while studying the process of fertilization, he found the nucleus in the reproductive cells under the microscope.

Explanation of the incorrect options:

Option A:

Robert Hooke discovered the first dead cell in 1665 from the bark of the tree.

Option C:

Anton van Leeuwenhoek discovered the first living cell bacteria and spirogyra in 1974.

Option D:

The third point into the cell theory was added by Rudolf Virchow in 1855, which stated: "Omnis cellula e cellula" which means all cells arise only from pre-existing cells.

Final answer: The cell nucleus was discovered by Robert Brown.