Which of the following researchers observed densely stained reticular structures surrounding the nucleus (Hint: Figure)?

![Screenshot 2026-03-20 at 11.55.21 PM.png](https://res.cloudinary.com/aptidude/image/upload/v1774031132/aptidude_questions/qprsehzcv9y5qklpezqk.png)

Question

Which of the following researchers observed densely stained reticular structures surrounding the nucleus (Hint: Figure)?

![Screenshot 2026-03-20 at 11.55.21 PM.png](https://res.cloudinary.com/aptidude/image/upload/v1774031132/aptidude_questions/qprsehzcv9y5qklpezqk.png)

Accepted Answer

1. Historical observation: Camillo Golgi used the silver nitrate "black reaction" stain and described densely stained reticular structures surrounding the nucleus in nerve cells, which he called the internal reticular apparatus.

2. Identification: Those structures are now known as the Golgi apparatus (Golgi complex), named after Golgi himself.

3. Elimination of other options:
- William Harvey: discovered systemic blood circulation, not cellular reticular structures.
- Francis Crick: co-discovered the DNA double helix structure, not cellular staining observations of organelles.
- Louis Pasteur: famed for work in microbiology and pasteurization, not for discovering intracellular reticular structures.

Conclusion: The researcher who observed the densely stained reticular structures surrounding the nucleus is Camillo Golgi (option c).

FINAL_ANSWER: c

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