Which structural region of a transfer RNA (tRNA) molecule pairs directly with a codon on mRNA during translation?
Answer and explanation
Correct answer: C. Anticodon loop
- Step 1: A tRNA molecule has a characteristic cloverleaf secondary structure. Step 2. The anticodon loop contains a triplet of bases that forms complementary antiparallel hydrogen bonds with the mRNA codon. Answer: Anticodon loop. Why not the others: Acceptor stem binds the amino acid at its 3' CCA terminus; D loop contains dihydrouridine; T-psi-C loop contains pseudouridine for ribosome binding.
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