本题目来源于试卷: Interaction & Interdependence C.7 Defence Against Disease，类别为 IB生物学
[单选题]
Antibodies are proteins tha-r8m(-jb n kswt bind z a5 7+,avat+uwk sxxcv qz7 /nq1/9oom(sl4nto antigens. Which cell expresses the genes for antibody prodnx +74 w1a7lnavqxsvous5at/ /q c9(m o,z zk+uction?
A. Plasma B cells
B. Macrophages
C. Helper T cells
D. Red blood cells
参考答案: A
本题详细解析:
Explanation: Choice A - Antibodies are globular proteins synthesized by plasma B cells. The genes associated with antibody synthesis are expressed in plasma B cells. Choice B - Macrophages do not synthesize antibodies and therefore do not express these genes. Macrophages are large phagocytic cells and present antigens to helper T cells. Choice C - Helper T cells do not synthesize antibodies. They stimulate B cells to divide by mitosis to produce plasma B cells and memory B cells. Choice D - Red blood cells do not have a nucleus and therefore do not have the genes for antibody synthesis.
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