Which category of RNA is primarily responsible for transporting amino acids during protein synthesis?

• A. mRNA
• B. tRNA
• C. rRNA
• D. snRNA

Answer: (B)

The category of RNA primarily responsible for transporting amino acids during protein synthesis is transfer RNA, commonly known as tRNA. tRNA plays a crucial role in the process of translation, where it serves as the adapter molecule that decodes the information contained in messenger RNA (mRNA).

During translation, each tRNA carries a specific amino acid corresponding to the codon sequence on the mRNA. The tRNA molecule has an anticodon region that base-pairs with the complementary codon on the mRNA strand, ensuring that the correct amino acid is added to the growing polypeptide chain. This specificity is vital for the accurate synthesis of proteins, as proteins must be assembled in the correct order of amino acids to function properly.

Other types of RNA serve different functions within the cell. For example, mRNA acts as the template that carries genetic information from DNA to the ribosome for protein synthesis, while rRNA is a structural and functional component of ribosomes, facilitating the assembly of amino acids into proteins. snRNA has various roles within the nucleus, particularly in splicing pre-mRNA but is not involved in the transport of amino acids during protein synthesis.