How can a plasmid cause a bacteria to go from yellow to BLUE or PINK or GREEN but only when arabinose is present

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asked Apr 6, 2021 178k views

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Ahmed Mokhtar · Answer 1 · 2021-04-11T01:00:39+0000

Answer:

When arabinose is present in the environment, bacteria take it up. Once inside, the arabinose interacts directly with AraC, which is bound to the DNA. The interaction causes AraC to change shape, which in turn helps RNA polymerase bind the promoter, and the three genes araB, araA, and araD are transcribed.

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How can a plasmid cause a bacteria to go from yellow to BLUE or PINK or GREEN but only when arabinose is present

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