Site for protein/peptide synthesis is

Options

A. Pyrenoid
B. Chloroplast
C. Ribosome
D. Mitochondrion

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the site of protein or peptide synthesis in the cell.

2. **Evaluating the Options**:
- **Option A: Pyrenoid**:
- The pyrenoid is a subcellular compartment found in the chloroplasts of certain algae.
- Its primary function is to assist in carbon dioxide fixation during photosynthesis, not in protein synthesis.
- Therefore, this option is incorrect.

- **Option B: Chloroplast**:
- Chloroplasts are membrane-bound organelles found in plant cells.
- They are primarily involved in photosynthesis and contain chlorophyll.
- While they play a crucial role in energy conversion, they are not the site of protein synthesis.
- Thus, this option is also incorrect.

- **Option C: Ribosomes**:
- Ribosomes are the cellular structures responsible for protein synthesis.
- They can be found free in the cytoplasm or attached to the endoplasmic reticulum, forming rough ER.
- Ribosomes translate messenger RNA (mRNA) into polypeptide chains, making this the correct option.

- **Option D: Mitochondria**:
- Mitochondria are known as the powerhouse of the cell because they generate ATP through cellular respiration.
- They do not play a direct role in protein synthesis, making this option incorrect.

3. **Conclusion**: After evaluating all the options, the correct answer is **C: Ribosomes**, as they are the primary site for protein/peptide synthesis in the cell.

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