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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 II) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline?

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 II) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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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 II) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline?
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 II) could not synthesize arginine from either ornithine or citrulline. Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline?
Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline? class I only classes I and II only classes I and III only classes I, Il and IlII class II only class II and IIl only class III only none of the three classes can accomplish this
Transcribed Image Text:Which class or classes of arg mutants LACK a functional enzyme able to convert ornithine into citrulline? class I only classes I and II only classes I and III only classes I, Il and IlII class II only class II and IIl only class III only none of the three classes can accomplish this
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