The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid.  Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I have a Neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning.

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid. 

Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I have a Neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning. 

ornithine
citrulline
arginine
I I
Enzyme A
Enzyme B
Enzyme C
Gene A
Gene B
Gene C
Transcribed Image Text:ornithine citrulline arginine I I Enzyme A Enzyme B Enzyme C Gene A Gene B Gene C
Adult
Germinating
conidium
Vegetal
Spore
Gametes
140O
Ascospore
HAPLOID
Meiosis
Fertilization
DIPLOID
Nue
(Zygote
• 2001 Sinauer Associates, Inc.
Transcribed Image Text:Adult Germinating conidium Vegetal Spore Gametes 140O Ascospore HAPLOID Meiosis Fertilization DIPLOID Nue (Zygote • 2001 Sinauer Associates, Inc.
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