The function of tRNA during protein synthesis is to __________.

• A. guide ribosomal subunits out of the nucleus through nuclear pores
• B. attach mRNA to the small subunit of the ribosome
• C. process mRNA
• D. deliver amino acids to their proper site during protein synthesis

Answer: (D)

Verified step by step guidance

1. Understand the role of tRNA in protein synthesis: tRNA, or transfer RNA, is crucial in translating the genetic code from mRNA into a sequence of amino acids, which will form a protein.
2. Recognize the structure of tRNA: Each tRNA molecule has an anticodon region that is complementary to an mRNA codon, and an attached specific amino acid corresponding to that codon.
3. Identify the process of translation: During translation, tRNA molecules deliver amino acids to the ribosome, where the mRNA is read in sets of three nucleotides (codons).
4. Match tRNA anticodons with mRNA codons: The anticodon of the tRNA pairs with the codon on the mRNA strand, ensuring that the correct amino acid is added to the growing polypeptide chain.
5. Conclude the function of tRNA: The primary function of tRNA during protein synthesis is to deliver amino acids to their proper site on the ribosome, facilitating the assembly of proteins.