The type of RNA responsible for proper se- quence of amino acids in protein synthesis is

Options

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

Answer

To answer the question about the type of RNA responsible for the proper sequence of amino acids in protein synthesis, we can break down the process of translation and the roles of different types of RNA involved.

### Step-by-Step Solution:

1. **Understanding Protein Synthesis**: Protein synthesis occurs in two main stages: transcription and translation. During translation, the sequence of amino acids in a protein is determined.

2. **Types of RNA Involved**: There are three main types of RNA involved in protein synthesis:
- **mRNA (messenger RNA)**: This RNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.
- **tRNA (transfer RNA)**: This RNA helps in bringing the appropriate amino acids to the ribosome during protein synthesis. It has an anticodon that pairs with the codon on the mRNA.
- **rRNA (ribosomal RNA)**: This RNA forms the core of the ribosome's structure and catalyzes protein synthesis.

3. **Role of mRNA**: The mRNA contains codons, which are sequences of three nucleotides that specify which amino acid will be added next during protein synthesis. The sequence of codons in the mRNA determines the order of amino acids in the resulting protein.

4. **Role of tRNA**: The tRNA recognizes the codons on the mRNA through its anticodon and brings the corresponding amino acids to the ribosome. However, it is the mRNA that dictates the sequence of amino acids.

5. **Conclusion**: Since the question specifically asks for the type of RNA that is responsible for the proper sequence of amino acids, the answer is **mRNA**. It is the mRNA that carries the codons that determine the order of amino acids in the protein.

### Final Answer:
The type of RNA responsible for the proper sequence of amino acids in protein synthesis is **mRNA (messenger RNA)**.

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