Neurospora crassa can synthesize the amino acid arginine from a precursor as follows: precursor ornithine citrulline arginine George Beadle and Edward Tatum identified various mutants (arg mutants) unable to synthesize arginine from this precursor. One such class (Class I) could synthesize arginine if either ornithine or citrulline was supplied. A second mutant class (Class II) could synthesize arginine if citrulline was added, but not if ornithine was added. A third class (Class III) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants will grow on complete media?
Neurospora crassa can synthesize the amino acid arginine from a precursor as follows: precursor ornithine citrulline arginine George Beadle and Edward Tatum identified various mutants (arg mutants) unable to synthesize arginine from this precursor. One such class (Class I) could synthesize arginine if either ornithine or citrulline was supplied. A second mutant class (Class II) could synthesize arginine if citrulline was added, but not if ornithine was added. A third class (Class III) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants will grow on complete media?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Transcribed Image Text:Neurospora crassa can synthesize the amino acid arginine from a
precursor as follows:
precursor
ornithine
citrulline
arginine
George Beadle and Edward Tatum identified various mutants (arg
mutants) unable to synthesize arginine from this precursor. One such
class (Class I) could synthesize arginine if either ornithine or citrulline
was supplied. A second mutant class (Class II) could synthesize
arginine if citrulline was added, but not if ornithine was added. A
third class (Class III) could not synthesize arginine from either
ornithine or citrulline.
Which class or classes of arg mutants will grow on complete media?
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