試卷名稱:108年 - 108 長庚大學_研究所碩士班招生考試_生物醫學研究所碩士班:分子生物學#125898
年份:108年
科目:研究所、轉學考(插大)◆分子生物學
30. The Trp operon in Escherichia coli encodes the components necessary for tryptophan biosynthesis. In the presence of the amino acid in a bacterium,
(A) the tryptophan operator is bound to the tryptophan repressor.
(B) the tryptophan repressor is bound to bacterial RNA polymerase.
(C) the expression of the tryptophan repressor is shut off.
(D) the operon genes are expressed.