Q.Give reasons : Genetic code is universal.
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Start your 14-day free trial to unlock the full solution →The genetic code is termed universal because the same codon-to-amino-acid assignments hold true across nearly all living organisms, with only minor, well-documented exceptions.
When the genetic code was deciphered (largely through the work of Nirenberg, Khorana and others), it was found that a given triplet codon (e.g., UUU for phenylalanine) specifies the same amino acid whether it is being translated in a bacterium, a plant, or a human cell. This universality means that a gene from one organism, if introduced and expressed in a completely different organism, will still be translated correctly into the same protein/amino acid sequence -- a fact exploited in genetic engineering (e.g., production of human insulin in bacteria). The universality is strong evidence that all living organisms have descended from a common ancestor that possessed this code, and that the code was established very early in the evolution of life. A small number of exceptions exist (e …
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