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The molecule that carries amino acids to the ribosome and binds to a mRNA ensuring a proper amino acid sequence in the resulting polypeptide is a(n):
a. tRNA
b. mRNA
c. rRNA
d. sRNA

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Answer: a. tRNA

Explanation: The transference RNA is a nucleic acid that participates of the protein synthesis. tRNA is a small RNA with folding as a trefoil. The tRNA has a site where aminoacid is loaded and a anticodon site that is complementary to the codon in the mRNA, ensuring the proper aminoacid sequence in the resulting polypeptide.

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