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.