THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AUG
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TAC
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UTC
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UAC
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Detailed explanation-1: -Methionine is an aminoacid for which the codon on mRNA is AUG. The complementary sequence in the anticodon loop of tRNA will be UAC.
Detailed explanation-2: –According to Chargaff’s base-pairing rules and antiparallel alignment of anticodon and codon, we can say that the tRNA anticodon 3’-UAC-5’ will pair with the mRNA codon 5’-AUG-3’. This codon AUG is the initiation codon and it codes for formyl-Methionine. Thus, the correct answer is C i.e., 5’-AUG-3’.
Detailed explanation-3: -The tRNA anticodon is a sequence of three nucleotides that are the complement of the three nucleotides in the mRNA codon. The function of the anticodon is to help the tRNA find the appropriate amino acid that the mRNA codon specified.
Detailed explanation-4: -Methionine: the mRNA codon is AUG, and the tRNA anticodon is UAC.