Concept of universality of the genetic code, Biology

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Q. What is the concept of universality of the genetic code? What are the exceptions to this universality?

The genetic code is universal because the rules of protein codification based on mRNA codons are practically the same for all called living beings. For instance, the genetic code is the same for humans, for invertebrates and for bacteria.

The protein synthesis in chloroplasts, mitochondria and some protozoans however are accomplished by different genetic codification.


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