75. Which of the following statements about bacterial gene regulation is FALSE?
(A) Tryptophan binds to activate repressor of trp operon.
(B) Allolactose is an inducer of lac operon.
(C) The product of lac I is the repressor of lac operon.
(D) Inactive repressor turns the repressible operon off.
(E) Catabolite activator protein (CAP) is activated by cAMP in lac operon.
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統計: A(6), B(1), C(7), D(43), E(4) #937784
統計: A(6), B(1), C(7), D(43), E(4) #937784
詳解 (共 6 筆)
#1155790
標準答案更正為D 謝謝
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#6468267
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選項 |
敘述 |
解釋 |
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C |
The product of lac I is the repressor of lac operon |
lacI 是一個調控基因,會轉錄出 mRNA 並轉譯成 lac repressor 蛋白,這個蛋白能結合在 operator 上,阻止轉錄 |
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D |
Inactive repressor turns the repressible operon off |
active repressor 才能關掉 repressible operon,不是 inactive repressor |
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