8. You may draw the following conclusions (TRUE or FALSE):

A. Exposure to substance X during G0 arrests the cells in G0. False

B. Exposure to substance X after the cells have crossed the R point arrests the
cells before S phase. True

C. Cells are accumulated before  S phase, because the FACS analysis was
performed too soon and the cells did not have enough time to enter S phase. False FACS analysis was performed on cells harvested 16 hrs after CS readdition. At this time around 40% of the cells were found in S-phase.