Nissl granules found in cyton of a neuron and having affinity for basic dyes are composed of

Options

A. DNA
B. RNA
C. Proteins
D. Amino acids

Answer

To solve the question about the composition of Nissl granules found in the cyton of a neuron, we can follow these steps:

### Step 1: Understand what Nissl granules are
Nissl granules, also known as Nissl bodies or Nissl material, are large granular bodies found in neurons (nerve cells). They are important for the functioning of neurons.

**Hint:** Nissl granules are specific structures in neurons that play a role in protein synthesis.

### Step 2: Identify the composition of Nissl granules
Nissl granules are primarily composed of rough endoplasmic reticulum (RER) and clusters of free ribosomes. The rough endoplasmic reticulum is involved in the synthesis of proteins, and the free ribosomes are the sites where protein synthesis occurs.

**Hint:** Think about the structures involved in protein synthesis within the cell.

### Step 3: Recognize the role of RNA in Nissl granules
Nissl granules contain ribonucleic acid (RNA), which is essential for the translation process where RNA is converted into proteins. This is why Nissl granules are associated with protein synthesis.

**Hint:** Consider the relationship between RNA and protein synthesis.

### Step 4: Analyze the options given in the question
The options provided are DNA, RNA, proteins, or amino acids. Since we established that Nissl granules are involved in protein synthesis and contain RNA, we can conclude that the correct answer is RNA.

**Hint:** Eliminate options that do not directly relate to the composition of Nissl granules.

### Final Answer
Nissl granules found in the cyton of a neuron and having affinity for basic dyes are composed of **RNA**.