Question

In which type of cell are Nissl granules found?

• A. Neuron
• B. Schwann cell
• C. Myelin sheath
• D. None of the above

Hint:

Nissl granules are unique to neurons and are involved in protein synthesis. They help distinguish neuronal cell bodies from glial cells under a microscope.

Answer 1

The Correct Option is A

Step 1: Understand what Nissl granules are
Nissl granules, also known as Nissl bodies, are composed of rough endoplasmic reticulum and ribosomes.
They are responsible for protein synthesis in certain cells and are characterized by their basophilic appearance under a microscope. Step 2: Identify the cellular location of Nissl granules
These granules are specifically present in neurons, particularly in the cyton (cell body) and dendrites.
They are not found in axons, Schwann cells, or myelin sheaths. Step 3: Analyze each option (A) Neuron
Found in the cytoplasm of neurons. Contains Nissl granules for synthesizing neurotransmitters and other proteins. (B) Schwann cell
Schwann cells are glial cells that produce myelin in the peripheral nervous system. They do not contain Nissl granules. (C) Myelin sheath
The myelin sheath is a lipid-rich layer formed by Schwann cells or oligodendrocytes.
It does not have organelles like Nissl granules. (D) None of the above
This is incorrect because Nissl granules are indeed present in neurons. Step 4: Conclusion The correct answer is: $$ (A) Neuron $$