RNA which is almost in the form of a regular double helix is

Options

A. r RNA
B. m RNA
C. ds RNA
D. t RNA

Answer

To solve the question regarding which type of RNA is almost in the form of a regular double helix, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding RNA Types**:
- There are different types of RNA in cells, including rRNA (ribosomal RNA), mRNA (messenger RNA), and tRNA (transfer RNA). Each of these has distinct functions in the process of protein synthesis.

2. **Analyzing the Options**:
- **rRNA**: This type of RNA is part of the ribosome structure but is not typically in a double helix form.
- **mRNA**: This is a single-stranded RNA that carries genetic information from DNA to the ribosome for protein synthesis.
- **tRNA**: This type of RNA helps in the translation process during protein synthesis but is also not in a double helix form.

3. **Identifying the Double Helix Structure**:
- The question specifies that we are looking for RNA that is "almost in the form of a regular double helix." This indicates that we are looking for a type of RNA that can form a double-stranded structure.

4. **Recognizing Double-Stranded RNA**:
- The type of RNA that fits this description is **dsRNA (double-stranded RNA)**. dsRNA consists of two strands that can pair with each other, forming a helical structure similar to that of DNA.

5. **Conclusion**:
- Therefore, the answer to the question is **dsRNA**.

### Final Answer:
The RNA which is almost in the form of a regular double helix is **dsRNA**.

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