Experiments using the two mutant strains P and Q, reveal that strain P accumulates citrulline, but strain Q does not. Which of the following statements is most consistent with the data provided?
- A. Strain Q has only one mutation.
- B. Strain P has a mutation in argF only.
- C. Strain P has mutations in argF, argG and argH.
- D.Strain P has a mutation in argG only.
Solutions say Choice C is correct.
If strain P accumulates citrulline, doesn't that mean that the ArgF gene is okay as this bacterial mutant strain is able to make citrulline? I thought that the mutation in strain P would be in gene ArgG because it can't convert citrulline to other products in this pathway.
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