Which form of RNA has a structure resembling clover leaf ?

Options

A. tRNA
B. mRNA
C. hnRNA
D. rRNA

Answer

To answer the question "Which form of RNA has a structure resembling clover leaf?" we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of RNA**:
- The question provides four options: tRNA (transfer RNA), mRNA (messenger RNA), HnRNA (heterogeneous nuclear RNA), and rRNA (ribosomal RNA).

2. **Understand the Structures of RNA**:
- Each type of RNA has a distinct structure:
- **mRNA** is typically linear and does not have a cloverleaf structure.
- **rRNA** is involved in ribosome structure and also does not resemble a cloverleaf.
- **HnRNA** is a precursor to mRNA and has a more complex structure but is not cloverleaf-shaped.
- **tRNA** has a unique three-dimensional structure that is often represented as a cloverleaf in diagrams.

3. **Focus on tRNA**:
- tRNA is known for its cloverleaf structure, which is a result of its folding due to complementary base pairing. This folding creates loops and stems in the molecule.

4. **Describe the tRNA Structure**:
- The tRNA molecule is compact and typically resembles an inverted L shape in its functional form. However, when represented in two dimensions, it is often depicted as a cloverleaf.
- The structure consists of several loops, including the anticodon loop, which is crucial for its function in protein synthesis.

5. **Conclude the Answer**:
- Based on the above analysis, the form of RNA that has a structure resembling a cloverleaf is **tRNA (transfer RNA)**.

### Final Answer:
The form of RNA that has a structure resembling a clover leaf is **tRNA (transfer RNA)**.

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