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Question

Genetically engineered human insulin is prepared by using which microbe?

A
E. coli
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B
Rhizopus
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C
Pseudomonas
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D
Yeast
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Solution

The correct option is A E. coli
When E.coli reproduces, the insulin gene is replicated along with the plasmid, a circular section of DNA. E.coli produces enzymes that rapidly degrade foreign proteins such as insulin. By using mutant strains that lack these enzymes, the problem is avoided.

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