Question

Nissl granules occur in which part and what is their function?

• A. Neurons and site of protein synthesis
• B. Blood helps in the nutrition and excretion
• C. Sarcoplasm and help in the contraction
• D. Cell and secrete mucous

Answer 1

The correct option is A

Neurons and site of protein synthesis

The correct option is A.
Explanation for the correct option:
Option A:

1. A Nissl body, also known as Nissl or tigroid substance is a large granular body found in neurons.
2. These granules are rough endoplasmic reticulum (RER) with rosettes of free ribosomes and are the sites of protein synthesis.
3. Nissl’s Granules are the substances found in the neurons which are nerve cells.
4. These granules are very useful for protein synthesis and also help to transport these proteins to the part known as cyton.

Explanation for the incorrect options:
Option B:

Nissle granule is found in neurons, they are specifically found in nervous tissue. Hence, it is absent in blood. Blood is a type of connective tissue that carries oxygen, carbon dioxide, and nutrients.
Option C:
Nissle granule is found in neurons and is specifically found in nervous tissue. It is absent in sarcoplasm which is a muscle cell.
Option D:
Nissle granules are characteristic cells of neurons and have no role in general cell and any secretion.

Final answer: Nissl granules occur in neurons and their function is to synthesize the protein.