What is the main function of t-RNA is relation to protein synthesis ?

Options

A. proofreading
B. identifies amino acids and transports them to ribosomes
C. inhibits protein synthesis
D. all of these

Answer

### Step-by-Step Solution:

1. **Understanding tRNA**: Transfer RNA (tRNA) is a type of RNA molecule that plays a crucial role in the process of protein synthesis. It is responsible for bringing amino acids to the ribosome, where proteins are assembled.

2. **Function of tRNA**: The main function of tRNA is to identify specific amino acids and transport them to the ribosome. Each tRNA molecule is specific to one amino acid and has an anticodon that pairs with the corresponding codon on the mRNA strand.

3. **Role in Protein Synthesis**: During protein synthesis, the ribosome reads the sequence of codons on the mRNA. Each codon corresponds to a specific amino acid. The tRNA molecules bring the appropriate amino acids to the ribosome in the correct order, as dictated by the mRNA sequence.

4. **Conclusion**: Therefore, the main function of tRNA in relation to protein synthesis is to identify specific amino acids and transport them to the ribosomes, where they are linked together to form a protein.

5. **Final Answer**: The correct option is B: "Identifies amino acids and transport them to ribosomes."