A cell, which is very active in the synthesis and secretion of proteins, would be expected to have

Options

A. equal amount of RER and SER
B. more SER than RER
C. more RER than SER
D. more Golgi bodies and no ER.

Explanation

To answer the question, "A cell, which is very active in the synthesis and secretion of proteins, would be expected to have," we need to analyze the components of the cell involved in protein synthesis and secretion.

### Step-by-Step Solution:

1. **Understanding Protein Synthesis**:
- Protein synthesis occurs primarily on ribosomes. Ribosomes can be found either free in the cytoplasm or bound to the rough endoplasmic reticulum (RER). The RER is called "rough" because it has ribosomes attached to its surface.

2. **Role of Rough Endoplasmic Reticulum (RER)**:
- The RER is crucial for the synthesis of proteins that are either secreted from the cell or sent to lysosomes or the plasma membrane. The ribosomes on the RER translate mRNA into polypeptide chains, which then enter the lumen of the RER for folding and modification.

3. **Role of Smooth Endoplasmic Reticulum (SER)**:
- The smooth endoplasmic reticulum (SER) does not have ribosomes and is involved in lipid synthesis, detoxification, and calcium ion storage. It does not play a direct role in protein synthesis.

4. **Importance of Golgi Apparatus**:
- After proteins are synthesized in the RER, they are transported to the Golgi apparatus for further processing, sorting, and packaging for secretion or delivery to other organelles.

5. **Conclusion**:
- Since the question specifies a cell that is very active in protein synthesis and secretion, it would have a higher amount of rough endoplasmic reticulum compared to smooth endoplasmic reticulum. Therefore, the correct answer is that the cell would be expected to have **more RER than SER**.

### Final Answer:
A cell that is very active in the synthesis and secretion of proteins would be expected to have **more rough endoplasmic reticulum (RER) than smooth endoplasmic reticulum (SER)**.

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