Final answer:
The MLL complex recruits histones and activates pol II elongation by suppressing the FACT complex.
Step-by-step explanation:
The MLL complex is recruited to the promoter and can modify histones/activate pol II elongation by suppressing the FACT complex.
FACT, which stands for "facilitates chromatin transcription," is responsible for pulling histones away from the DNA template as the polymerase moves along it. This allows for the transcription machinery to move histones out of the way and initiate polynucleotide synthesis.
By suppressing the FACT complex, the MLL complex can prevent histones from being replaced and therefore modify histones and activate pol II elongation.