阿摩線上測驗
85. Transcriptional activators that have variable positions and orientations are called _______.
(A) enhancers
(B) operators
(C) introns
(D) polycistrons
(E) promoters
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統計： A(74), B(8), C(0), D(16), E(14) #1997444
統計： A(74), B(8), C(0), D(16), E(14) #1997444
