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15044 Pathology

An 8-year-old child is evaluated by the pediatrician, who notes small cafe-au-lait spots on the child’s torso. In addition, on close inspection of the eyes, the presence of Lisch nodules is noted. The patient is eventually diagnosed with neurofibromatosis type 1. The protein that is mutated in this disorder normally does which of the following functions?

AActivates the GTPase activity of Ras
BCleaves cellular proteins during apoptosis
CFunctions as a cell cycle checkpoint regulator
DPromotes angiogenesis
Pathology
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