Question

Based on these data alone, identify the most appropriate hypothesis that explains the effect of peptides 1 and 2 on the quorum-sensing pathways of s. aureus.

Answer 1

Data shows results of an experiment which was added to each peptide to culture the TRAP. Mutants of S. aureus and culture of the Agr. mutant of s. aureus.
Peptide 1 and three blocks Agr pathway
Peptide 2 blocks TRAP pathway
This is because the mutants are already blocked for one of the pathways.
Therefore it gives way to determine which pathway each peptide act on.