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joha961  From a random paper I found, “Arguably p53’s most important function is to act as a transcription factor that directly regulates perhaps several hundred of the cell’s RNA polymerase II (RNAP II)-transcribed genes.” So normally it increases RNA pol binding; a mutation would decrease it. +1  
estsosa  The TATA box is part of the promoter region site where RNA polymerase II and other transcription factors bind to DNA. A defect would therefore decrease binding of RNA polymerase. +6  
mnemonia  Also you can reason it out (I got this wrong because you have to be really meticulous) since we know that loss of p53 = cancer. Cancer = want more cell division = don’t want inhibitory gene = less transcription of said gene. +1