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Question: 1the atgc ratios of e coli and mycobacterium tuberculosis differ...

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1)The (A+T)/(G+C) ratios of E. Coli and Mycobacterium tuberculosis differ significantly. In which of the following classes of genes, those that encode (a) tRNAs, (b) rRNAs or ( c) mRNAs would there most likely be a large difference in the (A+T)/(G+C) ratios between these two species? Explain your reasoning.

2) Describe the main differences between bacterial and eukaryotic transcripts.

3)When researchers used a synthetic polynucleotide with the sequence CGU repeated many times (CGUCGUCGUCGU…) in an in vitro translation system, they obtained the following polypeptides: polyarginine, polyvaline and polyserine. Explain why this result indicates that the genetic code consists of trinucleotide codons.

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