Is the genetic code universal across different organisms?

Is the genetic code universal across different organisms?
  1. Yes, except in some protozoans
  2. No, it varies significantly between different organisms
  3. Yes, except in some mitochondrial codons
  4. Yes, without any exceptions

Solution

The genetic code is nearly universal, but there are some exceptions such as in some mitochondrial codons and in some protozoans.

Asked in: NCERT

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