Which of the following options is true for a secretory cell ?

Options

A. Glogi apparatus is absent.
B. RER is easily observed in the cell.
C. Only SER is present
D. Secretory granules are formed in nucleus

Explanation

To determine which option is true for a secretory cell, let's analyze the characteristics and functions of secretory cells step by step.

### Step-by-Step Solution:

1. **Definition of Secretory Cells**:
- Secretory cells are specialized cells that produce and secrete substances such as proteins, hormones, and enzymes.

2. **Role of Rough Endoplasmic Reticulum (RER)**:
- Secretory cells have a high demand for protein synthesis. The rough endoplasmic reticulum (RER) is crucial for this process because it is studded with ribosomes, which are the sites of protein synthesis.

3. **Presence of Ribosomes**:
- The ribosomes attached to the RER synthesize proteins that are either secreted from the cell or incorporated into the cell membrane.

4. **Characteristics of Secretory Cells**:
- Secretory cells typically have a large number of rough endoplasmic reticulum due to their role in synthesizing proteins. This is especially true for cells like pancreatic cells and plasma cells.

5. **Analyzing the Options**:
- **Option 1**: "Golgi apparatus is absent."
- This is incorrect because the Golgi apparatus is involved in processing and packaging proteins for secretion.
- **Option 2**: "Rough endoplasmic reticulum is easily observed in the cell."
- This is correct as secretory cells have abundant rough endoplasmic reticulum.
- **Option 3**: "Only smooth endoplasmic reticulum is present."
- This is incorrect because secretory cells require rough endoplasmic reticulum for protein synthesis.
- **Option 4**: "Secretory granules are formed in the nucleus."
- This is incorrect; secretory granules are formed in the cytoplasm, not in the nucleus.

6. **Conclusion**:
- The correct option is: **"Rough endoplasmic reticulum is easily observed in the cell."**