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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TCA
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UGA
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AGU
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UCA
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Detailed explanation-1: -Answer and Explanation: If the mRNA codon reads UAA GCG AGU CCA, the corresponding tRNA anticodon would consist of the complementary pairs and would thus read: AUU CGC UCA GGU.
Detailed explanation-2: -Anticodon UGU would also be used for reading codon ACU as a redundancy of tRNA(Thr)-(AGU), as deduced from the mitochondrial code where unmodified uracil at the first anticodon position can pair with adenine, cytosine, guanine, and uracil by four-way wobble.
Detailed explanation-3: -AUA is the anticodon on tRNA for UAU codon in an mRNA.
Detailed explanation-4: -Methionine: the mRNA codon is AUG, and the tRNA anticodon is UAC.
Detailed explanation-5: –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.