We conducted a whole transcriptome analyses of a wild type s

We conducted a whole transcriptome analyses of a wild type strain of Escherichia coli (shown as H5, in Figure 1). Cells were grown using either glucose or arabinose as a carbon source. Agure 1 Gkucose Arabinose Color Scale 1 No change Strong Roure 2 Glucose Arabinose Color Scale Color Scale 1 No change A No change induction

Solution

QUESTION 1

According to figure 1, which gens are specifically induced when arabinose is used

Answer : D,E,F

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QUESTION 2

Answer : EACH GENE IS TRANSCRIBED ON ITS TRANSCRIPTIONAL UNITS

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QUESTION 3

After analysing the expression pattern in the wild type strain (HS) , a gene deletion mutatnt in gene D was constructed

Answer : GENE D IS AN inducer

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Different operons apply   various strategies and combinations of induction and repression.

One operon, the arabinose operon, uses a regulatory protein, araC protein, that can act as EITHER a repressor OR an inducer of the arabinose operon promoter in response to whether arabinose is available to the cell or not.