Consider the pathway for the synthesis of the amino acid arginine in Neurospora:

Question

Consider the pathway for the synthesis of the amino acid arginine in Neurospora:  

ARG-E         ARG-F                      ARG-H

ornithine --> citrulline --> argininosuccinate --> arginine

Mutant strains of Neurospora are grown in minimal media supplements as follows. Each mutantstrain carries only a single mutation. Growth is shown by (+) and no growth is shown by (-).

Supplements

Pair each mutant strain with the correct gene in the pathway

Mutant Strain minimal ornithine citrulline argininosuccinate arginine A - - - + + B - - + + + C - - - - +

Explanation / Answer

pairing of the mutant strain with correct gene will be as follows:

strain a- ARG F

strain b- ARG E

strain c- ARG H

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