The genome of Escherichia coli consists of 4380 genes, encoding 4290 proteins, in just 5175720 base...

The genome of Escherichia coli consists of 4380 genes, encoding 4290 proteins, in just 5175720 base pairs. What percent fraction of the Escherichia coli genes encode proteins?

C. If the fraction of base pairs devoted to protein-coding genes is the same as the fraction of the total genes that they represent, what is the average number of base pairs per protein-coding gene? (Assume that there is no overlap of genes.) = ---------- base pairs per protein

Solutions

Expert Solution

Total number of genes present = 4380

Total number of proteins encoded by the genes = 4290

Total number of base pairss = 5175720

Percent fraction of genes encoding proteins:

4290 of the total genes code for proteins, though 4380 genes are present in total.

Fraction of genes encoding proteins = Total number of genes encoding proteins / Total number of genes present

= 4290/4380 = 0.9795

Percent fraction of genes encoding proteins = Fraction of genes encoding proteins * 100 = 0.9795*100

Percent fraction of genes encoding proteins = 97.95%

Average number of base pairs per protein-coding gene:

If the fraction of base pairs devoted to protein-coding genes is same as the fraction of the total genes they represent, the number of proteins encoded by 4380 genes will be 4380.

Average number of base pairs per protein-coding gene = Total number of base pair / Number of proteins

= 5175720/4380 = 1181.6 = 1182

Average number of base pairs per protein-coding gene = 1182

gladiator answered 1 year ago

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