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31 March, 08:35

What could lead you to conclude that the lac operon is on?

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  1. 31 March, 11:25
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    The X-gal medium is suitable for detection of gene regulation of the lack operon gene. The media turns from white to blue in the presence of beta-galactosidase, a gene product of lacZ. Beta-galactosidase cleaves lactose into galactose and glucose. Utilisation of lactose as an energy source by Escherichia occurs when there shortage of glucose in the environment.
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