Which is the largest

Options

A. tRNA
B. rRNA
C. mRNA
D. Both B and C.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Types of RNA**: There are three main types of RNA involved in protein synthesis: Transfer RNA (tRNA), Ribosomal RNA (rRNA), and Messenger RNA (mRNA).

2. **Identifying tRNA**: Transfer RNA (tRNA) is responsible for carrying amino acids to the ribosome, where proteins are synthesized. It is generally the smallest type of RNA.

3. **Identifying rRNA**: Ribosomal RNA (rRNA) forms the core of the ribosome's structure and is crucial for protein synthesis. It consists of two subunits: a larger subunit and a smaller subunit.

4. **Identifying mRNA**: Messenger RNA (mRNA) carries the genetic information from DNA to the ribosome for protein synthesis. The size of mRNA can vary depending on the protein it encodes; it can be small or large.

5. **Comparing Sizes**: Among the three types of RNA:
- tRNA is the smallest.
- mRNA size varies but is generally larger than tRNA.
- rRNA is the largest type of RNA.

6. **Conclusion**: Based on the comparison of sizes, the largest type of RNA is Ribosomal RNA (rRNA).

7. **Final Answer**: Therefore, the answer to the question "Which is the largest?" is **Ribosomal RNA (rRNA)**.

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