3. 下列有關半抗原(haptens)的敘述何者正確? (A)本身無法刺激抗體的產生，也無法為抗體辨識與接合 (B)本身可刺激抗體的產生，但無法為抗體辨識與接合 (C)本身無法刺激抗體的產生，但可受抗體辨識與接合 (D)本身可刺激抗體的產生，也可受抗體辨識與接合。

3. 下列有關半抗原(haptens)的敘述何者正確?
(A)本身無法刺激抗體的產生，也無法為抗體辨識與接合
(B)本身可刺激抗體的產生，但無法為抗體辨識與接合
(C)本身無法刺激抗體的產生，但可受抗體辨識與接合
(D)本身可刺激抗體的產生，也可受抗體辨識與接合。

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統計： A(2), B(4), C(13), D(2), E(0) #3233824

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B1 · 2025/10/25

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1. 題目解析半抗原（haptens...

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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.

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