What role is played by tRNA?

a. tRNA provides the mechanism that replaces thymine in DNA with uracil in mRNA.
b. tRNA joins its amino acid to the peptide chain when it matches an mRNA codon.
c. tRNA unwinds mRNA in advance of the polymerase responsible for transcription.
d. tRNA binds to the promoter region and recruits the correct polymerase for transcription.


b. tRNA joins its amino acid to the peptide chain when it matches an mRNA codon.

Biology & Microbiology

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