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6
votes
Accepted
Why is mRNA needed in the Protein translation?
One reason is that an intermediate like mRNA allows for higher amounts of protein expression. You can have multiple mRNA molecules that are translated simultaneously. If you read directly from DNA you …
12
votes
Accepted
Why does Nature use a 4-level system to encode information in DNA?
The current hypothesis is that RNA came first, DNA and proteins came later. So the reason that four bases are used might be related to the initial RNA world, and then DNA just reused the already exist …