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28 July, 06:54

What is a reason for transcribing many mRNA copies from a single DNA gene?

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  1. 28 July, 07:55
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    Because many identical RNA copies can be made from the same gene, and each RNA molecule can direct the synthesis of many identical protein molecules, cells can synthesize a large amount of protein rapidly when necessary. But each gene can also be transcribed and translated with a different efficiency, allowing the cell to make vast quantities of some proteins and tiny quantities of others (Figure 6-3). Moreover, as we see in the next chapter, a cell can change (or regulate) the expression of each of its genes according to the needs of the moment-most obviously by controlling the production of its RNA.
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