Peptide synthesis inside a cell takes place in

Options

A. chloroplast
B. mitochondria
C. chromoplast
D. ribosomes

Answer

### Step-by-Step Solution:

1. **Understanding Peptides**:
- Peptides are short chains of amino acids that are linked together by peptide bonds. They are essentially the building blocks of proteins.

2. **Identifying the Location of Peptide Synthesis**:
- The question asks where peptide synthesis occurs within a cell. We need to analyze the options provided: chloroplasts, mitochondria, chromoplasts, and ribosomes.

3. **Evaluating Each Option**:
- **Chloroplasts**: These organelles are primarily involved in photosynthesis, converting light energy into chemical energy. They do not play a direct role in peptide synthesis.
- **Mitochondria**: Known as the powerhouse of the cell, mitochondria are involved in ATP production through cellular respiration. They are not directly involved in synthesizing peptides.
- **Chromoplasts**: These organelles are responsible for pigment synthesis and storage, contributing to the color of fruits and flowers. They do not participate in peptide synthesis.
- **Ribosomes**: These are the cellular structures where protein synthesis occurs. Ribosomes translate messenger RNA (mRNA) into polypeptide chains, which are then folded into functional proteins.

4. **Conclusion**:
- Based on the analysis, the correct answer is that peptide synthesis occurs in **ribosomes**.

### Final Answer:
Peptide synthesis inside a cell takes place in **ribosomes**.