Indicate True (T) and False (F) Statements Below Regarding Cellular

Short Answer

Indicate true (T) and false (F) statements below regarding cellular control of growth and division. Your answer would be a four-letter string composed of letters T and F only, e.g. TFTF.
( ) Replicative cell senescence usually arises due to the accumulation of mutations in genes encoding S- and M-cyclins.
( ) Replicative cell senescence is caused by the induction of apoptosis by p53.
( ) Excessive mitogenic stimulation can result in Mdm2 activation and the induction of apoptosis or cell-cycle arrest.
( ) The Mdm2 inhibitor Arf induces cell-cycle progression.