GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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UUU
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UGG
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AUG
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UGA
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Detailed explanation-1: -For UGA there are two nc-tRNAs with the mismatch at the third/wobble position, Trp-and Cys-tRNAs. The third and last nc-tRNA with the wobble mismatch, Tyr-tRNA, is shared by the UAA and UAG stop codons.
Detailed explanation-2: -tRNA(UmUA) reads the UAA codon of alpha-globin mRNA and the UAG codon of tobacco mosaic virus (TMV) RNA, whereas tRNA(CUA) recognizes only UAG. This indicates that Tetrahymena uses UAA and UAG as glutamine codons and that UGA may be the only functional termination codon.
Detailed explanation-3: -Their amino acid acceptance and nucleotide sequences identify the two UGA-suppressor tRNAs as chloroplast (chl) and cytoplasmic (cyt) tryptophan-specific tRNAs with the anticodon CmCA.
Detailed explanation-4: -Which anticodon would bind to the mutated codon? The tRNA anticodon UAG is complementary to AUC, which is the sequence of the mRNA produced from the mutated DNA. Scientists can put a human gene into bacteria and have those bacteria produce the protein coded for by the human gene.