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1. What is the advantage of having a polycistronic mRNA in bacteria that can be controlled...

1. What is the advantage of having a polycistronic mRNA in bacteria that can be controlled by a single promoter?

2. How would eukaryotic genes that do not have operons ensure simultaneous expression of different genes

Please explain in simple words and specific thank you.

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1. The advantage of having a polycistronic mRNA in bacteria that can be controlled by a single promoter is that all the similar proteins or the proteins which are need for a specific process can be produced simultaneously and only one promoter can regulate the production of the proteins produced by polycistronic mRNA. One example of polycistronic mRNA or operon found in the bacteria is the lac operon consisting of 3 structural genes, namely lacZ which encodes for beta galactosidase, lacY which codes for beta-galactosidase permease and lacA which encodes for beta-galactosidase transacetylase. These three enzymes are linked with the lactose metabolism and are polycistronic and all the three are controlled by a single promoter.

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