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Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

1. Genetic code is not ambiguous
2. Genetic code is redundant
3. Genetic code is nearly universal
4. Genetic code is specific

Correct answer: Genetic code is nearly universal

Solution

The genetic code is nearly universal, meaning most codons specify the same amino acids in bacteria and humans. This lets bacteria translate a human insulin gene into the correct protein after recombinant DNA insertion.

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