本题目来源于试卷: Unity and Diversity A.5 Viruses，类别为 IB生物学
[单选题]
Some bacteriophages infect +9ueuxzguoo cw 0 0v5b3+fuy /or05xmh,m 9fc. lbtr.+d dh7yp+0u6fak0cx gp ost bacteria using the lytic cycle or the lysogenic cycle. Which process is characteristic of the lysogenic cycle but not hb .cmd07.f06klyapr u9 ,fp+t+dgxc the lytic cycle?
A. Phage DNA is injected into the host cell.
B. The phage inserts DNA into host DNA, forming a prophage.
C. Host bacterium is killed by cell lysis.
D. Phage proteins bind to receptors on the host bacterium cell.
参考答案: B
本题详细解析:
Choice B is correct because phage DNA is inserted into the host cell DN:y gw bt-0fel,A in the lysogenic cycle, but not the lytic cycle. During the lysogenic cycle and lytic cycle, phage proteif-gl0 b t,:eywns bind to specific receptors on the surface of the host bacterium (Choice D). Phage DNA is then inserted into the host bacterium (Choice A) in both the lysogenic cycle and lytic cycle. Host bacterial cells are killed by lysis in the lytic cycle (Choice C).
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