on the average , the tumor cell nuclei contained ( per mg of dna ) 8.9 , 1.5 , 2.7 , 20.0 , and 3.8 times the activities of rna polymerases ia , ib , iia , iib , and iii , respectively , as the normal cells , but the difference was significantly only for iib .
C0007610
cell nuclei
C0007634
normal cells