Assume That a Series of Compounds Has Been Discovered in Neurospora.Compounds

Multiple Choice

Assume that a series of compounds has been discovered in Neurospora.Compounds A-F appear to be members of an enzyme pathway.Several mutations have been identified and each of strains 1-4 contains a single mutation.Shown below are five possible pathways.Choose the pathway that best fits the data presented.[Growth in minimal media with supplements is shown by (+) , no growth is shown by (o) ] media supplement

A) A $\rarr$ B $\rarr$ C $\rarr$ D $\rarr$ E $\rarr$ F
B) A $\rarr$ B $\rarr$ C $\rarr$ F $\rarr$ D $\rarr$ E
C) F $\rarr$ B $\rarr$ C $\rarr$ D $\rarr$ A $\rarr$ E
D) A $\rarr$ B $\rarr$ C $\rarr$ D $\rarr$ F $\rarr$ E
E) A $\rarr$ B $\rarr$ F $\rarr$ E $\rarr$ C $\rarr$ D