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Q. In a mutant strain of E. coli, a tRNA that recognizes the codon 5' CUG 3' of normal cells has a point mutation so that it now recognizes codon 5' GUG 3' while still carrying its original amino acid. Unexpectedly, a missense mutation found in a protein-coding gene is no longer causing problems for the cell due to the presence of this mutant tRNA.
a. What amino acid is this tRNA carrying?
b. Before the missense mutation in the protein-coding gene, what was the unique encoded amino acid?
c. Before the change in the tRNA gene, what missense amino acid was incorporated in protein?
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particular bacterium had two DNA molecules in it, one that was 450 kilobases and one that was 550 kilobases, how would you decide if it had one chromosome and one plasmid, or two chromosomes?
What is the probability that his son would develop
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