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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UAC
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TAC
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ATG
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AAC
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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: -Methionine: the mRNA codon is AUG, and the tRNA anticodon is UAC.
Detailed explanation-3: –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.
Detailed explanation-4: -AUA is the anticodon on tRNA for UAU codon in an mRNA.
Detailed explanation-5: -The letters of the sequence AAC mean Adenine-Adenine-Cytosine. An anticodon should be complementary with uracil pairing with adenine and guanine pairing with cytosine. This means that the anticodon for Adenine-Adenine-Cytosine is Uracil-Uracil-Guanine or UUG.