All the body cells are of same origin and therefore, have same genes, yet they differ in structure and function because they synthesize different

Options

A. histones
B. ribosomes
C. mRNA molecule
D. tRNA molecules

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question states that all body cells originate from the same genetic material and contain the same genes. However, they exhibit different structures and functions. We need to identify what causes these differences.

2. **Analyzing the Options:**
- **Option A: Histones**
- Histones are proteins that help package DNA into a compact form (chromatin) but do not directly influence the differences in cell structure and function. Therefore, this option is incorrect.

- **Option B: Ribosomes**
- Ribosomes are the cellular machinery where protein synthesis occurs. While they are essential for producing proteins, they do not explain the differences in cell function and structure directly. Hence, this option is also incorrect.

- **Option C: mRNA (Messenger RNA)**
- mRNA is responsible for carrying genetic information from DNA to the ribosomes, where proteins are synthesized. Different cells express different sets of genes, leading to the production of different proteins, which in turn results in the diverse structures and functions of cells. This option is correct.

- **Option D: tRNA (Transfer RNA)**
- tRNA helps in translating the mRNA sequence into a protein but does not account for the differences in cell structure and function by itself. Thus, this option is incorrect.

3. **Conclusion:**
The correct answer is **Option C: mRNA (Messenger RNA)**, as it plays a crucial role in determining the differences in protein synthesis, which leads to the varied structures and functions of cells.

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