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Which American scientist entered graduate school intending to study ecology, but soon switched his focus to genetics and cytology and later on won a Nobel Prize for discovering the role of genes in regulating biochemical events in cells.
- A Franklin D. Keim
- B George W. Beadle
- C Rollins A. Emerson
- D Barbara McClintock
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George Wells Beadle was an American scientist in the field of genetics, and Nobel Prize in Physiology or Medicine Nobel laureate who with Edward Lawrie Tatum discovered the role of genes in regulating biochemical events within cells.
Beadle and Tatum's key experiments involved exposing the bread mold Neurospora crassa to x-rays, causing mutations. In a series of experiments, they showed that these mutations caused changes in specific enzymes involved in metabolic pathways. These experiments led them to propose a direct link between genes and enzymatic reactions, known as the "one gene, one enzyme" hypothesis.
