Gene Expression
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Questions and Answers

Gene expression, the process by which DNA directs protein synthesis, includes two stages: transcription and ______

translation

In 1902, British physician Archibald Garrod first suggested that genes dictate phenotypes through enzymes that catalyze specific chemical reactions. He thought symptoms of an inherited disease reflect an inability to synthesize a certain ______

enzyme

George Beadle and Edward Tatum exposed bread mold to X-rays, creating mutants that were unable to survive on minimal media. Their colleagues Adrian Srb and Norman Horowitz identified three classes of arginine-deficient mutants. Each lacked a different ______ necessary for synthesizing arginine.

enzyme

The DNA inherited by an organism leads to specific traits by dictating the synthesis of ______

<p>proteins</p> Signup and view all the answers

Cells synthesize and degrade molecules in a series of steps, a metabolic ______

<p>pathway</p> Signup and view all the answers

Who first suggested that genes dictate phenotypes through enzymes that catalyze specific chemical reactions?

<p>Archibald Garrod</p> Signup and view all the answers

What did George Beadle and Edward Tatum expose bread mold to, resulting in mutants that were unable to survive on minimal media?

<p>X-rays</p> Signup and view all the answers

What are the two stages included in gene expression, the process by which DNA directs protein synthesis?

<p>transcription and translation</p> Signup and view all the answers

What did British physician Archibald Garrod believe the symptoms of an inherited disease reflect?

<p>an inability to synthesize a certain enzyme</p> Signup and view all the answers

What are proteins considered as in relation to genotype and phenotype?

<p>links</p> Signup and view all the answers

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