NEET · Biology · STD 12 - 10. biotechnology and its application

Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?

A Bacterium
B Yeast
C Virus
D Phage

Verified Solution

Answer & Solution

Correct Answer

(A) Bacterium

Step-by-step Solution

Detailed explanation

The correct answer is bacterium.
In 1983, Eli Lilly, an American company, prepared two DNA sequences corresponding to ' A ' and ' B ' chains of human insulin and introduced them in plasmids of E.coli (a gram negative bacterium) to produce insulin chains.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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