複選題9. 關於下方大腸桿菌的乳糖操縱組模式圖，那些敘述正確？ (A)乙為調節基因，丙為構造基因 (B)丁是一種蛋白質，會抑制丙的表現 (C)抑制蛋白質與異乳糖結合後會抑制構造基因表現 (D)被 cAMP 活化的 CAP 將附著於乙處 (E)葡萄糖短缺時，cAMP 在細胞內蓄積，有利圖（二）反應進行。

複選題

9. 關於下方大腸桿菌的乳糖操縱組模式圖，那些敘述正確？

(A)乙為調節基因，丙為構造基因
(B)丁是一種蛋白質，會抑制丙的表現
(C)抑制蛋白質與異乳糖結合後會抑制構造基因表現
(D)被 cAMP 活化的 CAP 將附著於乙處
(E)葡萄糖短缺時，cAMP 在細胞內蓄積，有利圖（二）反應進行。

答案：登入後查看
統計： A(5), B(22), C(4), D(11), E(18) #3233830

詳解 (共 1 筆)

心誠則靈（已考上

B1 · 2024/05/17

#6100451

乙：operator，CAP應附著於promoter

5. Humans have harmless E. coli strains that reside in the intestines. O157:H7 is an E. coli strain reported to cause several food poisoning deaths. Evidence suggests that the virulence of O157:H7 is caused by genes from a virus that infects bacteria. Considering this evidence, which of the following statements most likely explains how the O157:H7 population acquired the genetic variation that distinguishes it from the harmless E. coli strains? (A) The virus entered the bacterial cell, allowing the bacteria's cellular machinery to create new viruses. (B) Viral envelope proteins bound receptors on the bacteria, allowing the viral genetic material to enter the cytoplasm and be translated into proteins that increased that bacterium's virulence. (C) The virus entered the cell and reassorted to acquire specific genes from the bacteria to increase the virulence of the virus. (D) The virus infected the bacterium, and the bacterial population replicated with a copy of the phage genome in each new bacterium.

詳解 (共 1 筆)

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