Biochemistry Section-USMLE Step 1
which histone ties DNA-histone nucleosome beads into more condensed structures? Answer- H1 is DNA acidic or basic? Answer- acidic what type of aa are histones made of? are they acidic or basic? Answer- lysine and arginine; basic is heterochromatic more accessible or less accessible to TF? euchromatin? Answer- less; more if a cell has a hyperchromatic or condensed nucleus is it undergoing transcription etc? Answer- no
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biochemistry section usmle step 1