If in a test tube, mRNA of bacillus, tRNAs from the pancreas of rats and rRNA from salmonella are taken and sufficient number of amino acids are put, then the polypeptide synthesized will be of the nature of

Options

A. Bacillus
B. rat body cells
C. both bacillus and rat body cells
D. salmonella

Answer

To solve the question regarding the synthesis of a polypeptide in a test tube containing mRNA from Bacillus, tRNAs from the pancreas of rats, rRNA from Salmonella, and a sufficient number of amino acids, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components**:
- We have mRNA from Bacillus, tRNA from rats, rRNA from Salmonella, and a sufficient supply of amino acids.

2. **Understand the Role of mRNA**:
- The mRNA serves as a template for protein synthesis. It contains codons that dictate the sequence of amino acids in the resulting polypeptide.

3. **Role of tRNA**:
- tRNA molecules bring the appropriate amino acids to the ribosome during translation. Each tRNA has an anticodon that pairs with the corresponding codon on the mRNA.

4. **Role of rRNA**:
- rRNA is a component of the ribosome, which facilitates the translation process. However, the specific type of rRNA (from Salmonella in this case) does not change the nature of the polypeptide being synthesized.

5. **Amino Acid Assembly**:
- The amino acids are linked together in the order specified by the codons on the mRNA. Since the mRNA is from Bacillus, the sequence of amino acids will correspond to the protein that Bacillus would produce.

6. **Conclusion**:
- The polypeptide synthesized will be of the nature of Bacillus, as the mRNA dictates the sequence of amino acids, and the tRNA from rats does not alter the identity of the polypeptide being synthesized.

### Final Answer:
The polypeptide synthesized will be of the nature of **Bacillus**.

---