FIGURE 1-7 The one-gene-one- enzyme model proposed that genes encode enzymes that carry out biochemical functions within cells. The one-gene-one-enzyme model Gene A Gene B Gene C Tatum and Beadle proposed this model based on the study of the synthesis of arginine (an amino acid) in the bread mold Neurospora crassa. Enzyme A Enzyme B Enzyme C Substrate Ornithine Citrulline Arginine

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Chapter10: Biotechnology
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. Figure 1-7 shows a simplified pathway for arginine
synthesis in Neurospora. Suppose you have a special
strain of Neurospora that makes citrulline but not arginine. Which gene(s) are likely mutant or missing in
your special strain? You have a second strain of
Neurospora that makes neither citrulline nor arginine
but does make ornithine. Which gene(s) are mutant or
missing in this strain?

FIGURE 1-7 The one-gene-one-
enzyme model proposed that genes
encode enzymes that carry out
biochemical functions within cells.
The one-gene-one-enzyme model
Gene A
Gene B
Gene C
Tatum and Beadle proposed this model
based on the study of the synthesis of
arginine (an amino acid) in the bread
mold Neurospora crassa.
Enzyme A
Enzyme B
Enzyme C
Substrate
Ornithine
Citrulline
Arginine
Transcribed Image Text:FIGURE 1-7 The one-gene-one- enzyme model proposed that genes encode enzymes that carry out biochemical functions within cells. The one-gene-one-enzyme model Gene A Gene B Gene C Tatum and Beadle proposed this model based on the study of the synthesis of arginine (an amino acid) in the bread mold Neurospora crassa. Enzyme A Enzyme B Enzyme C Substrate Ornithine Citrulline Arginine
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