Which of the following structure of adapter molecule looks like a clover leaf?

Options

A. Secondary
B. Tertiary
C. Primary
D. Quaternary

Answer

To solve the question "Which of the following structure of adapter molecule looks like a clover leaf?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about an adapter molecule that resembles a clover leaf in its structure. We need to identify which molecule fits this description.

2. **Identifying Adapter Molecules**: In molecular biology, the term "adapter molecule" often refers to tRNA (transfer RNA), which plays a crucial role in translating mRNA into proteins.

3. **Structure of tRNA**: tRNA has a unique structure that is often described as a clover leaf. This is due to its secondary structure, which includes various loops and stems that fold into this characteristic shape.

4. **Analyzing tRNA Structure**: The tRNA molecule consists of:
- **D loop**: This loop contains dihydrouridine.
- **T loop**: This loop contains ribothymidine.
- **Anticodon loop**: This loop contains the anticodon that pairs with the mRNA codon during translation.

5. **Conclusion**: Since tRNA has a secondary structure that resembles a clover leaf due to its looping and folding, we can conclude that the structure of the adapter molecule that looks like a clover leaf is indeed tRNA.

6. **Final Answer**: The correct answer is the **secondary structure of tRNA**.