How do the antibodies of sharks differ from those of mammals?
a. Shark antibodies do not have light chains.
b. Shark antibodies do not have heavy chains.
c. Shark antibodies have a different arrangement of embryonic gene segments.
d. Shark antibodies are produced without rearrangement of gene segments.
e. Shark antibodies have light, heavy, and moderate chains.
C
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The resulting cell from the union of a male animal sex cell and a female animal sex called is called a(n)
A. gamete. B. morula. C. polar body. D. zygote. E. oogonium.
How would the cell cycle be affected if you removed the phosphorylation sites in the Rb protein?
A. The cell cycle would not be affected because pRb is not phosphorylated normally. B. The cell cycle would be blocked in G1. C. The cell cycle would be blocked in G2. D. The cell cycle would be shorter.
A zygote is
a)a haploid cell. b)a gamete. c)a direct product of meiosis. d)All answers are correct.
Which of the following statements is TRUE concerning diphtheria?
A) No effective vaccine is available to prevent infection. B) A diffuse rash is the major sign of diphtheria. C) The signs and symptoms of the disease are directly caused by a bacterial toxin. D) The pseudomembrane is easily removed by surgery. E) A microscopic exam of bacterial samples is sufficient for conclusive diagnosis.