Clonal deletion of developing T lymphocytes takes place in which location(s) in the body?
A) the bone marrow
B) the spleen
C) the liver
D) both the bone marrow and the spleen
E) the thymus
E
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A chromosome that results when the centromere splits in the wrong plane during meiosis, forming identical arms, is a(n)
A) ring chromosome. B) metachromosome. C) parachromosome. D) isochromosome.
Which of the following do not serve as antigen presenting cells?
A. B lymphocytes B. Macrophages C. Basophils D. Dendritic cells
Granulomatous amebic encephalitis is caused by
a) Acanthamoeba. b) Naegleria fowleri. c) Trypanosoma brucei. d) Cryptococcus neoformans.
What is the function of the cellular structure indicated by "n" in Figure 3.3?
A. ATP synthesis B. protein synthesis C. synthesis of lipids D. packaging of materials for export E. cell movement and mitosis