George Walden was the engineer at the Eli Lilly in charge of insulin production and purification. George Walden’s major contribution was that:

Question

George Walden was the engineer at the Eli Lilly in charge of insulin production and purification.  George Walden’s major contribution was that:

BlackTom AI · Accepted Answer

Examining the question, we need to identify Walden’s major contribution at Eli Lilly regarding insulin.
Option 1: 'He invented a blood glucose meter' — This is not associated with Walden or Lilly’s insulin work; blood glucose meters were developed later by other researchers and companies, and this option mislabels his role.
Option 2: 'He optimized Fred Banting’s surgical procedure' — Walden did not alter Banting’s surgical approach; Banting’s surgery predates Lilly’s insulin purification work and is not attributed to Walden.
Option 3: 'He invented isoelectric precipitation.' — This attribution aligns with historical accounts of Walden’s contribution, where isoelectric precipitation was used to purify insulin, making the process more efficient and scalable at Lilly.
Option 4: 'He optimized Collip’s method of alcohol purification' — While Collip contributed to purification, the specific advancement most credited to Walden is the isoelectric precipitation technique, not merely optimizing alcohol-based methods.
Overall, the third option correctly reflects Walden’s notable role in developing isoelectric precipitation for insulin purification, distinguishing it from other unrelated or less accurate claims.

George Walden was the engineer at the Eli Lilly in charge of insulin production and purification. George Walden’s major contribution was that:单项选择题

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