During apoptosis
a. digestive enzymes are unleashed.
b. proteases break down structural proteins.
c. nucleases break down nucleic acids.
d. the nucleus breaks apart.
e. all of these occur.
Answer: e
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Photosynthesis occurs in many branches of the eukaryotic tree
A. true B. false
Sodium has one valence electron in its third energy level. To reach a stable energy configuration,
sodium will tend to
a. take up an electron from another atom. b. move its valence electron to the second energy shell. c. give up an electron to another atom. d. share its valence electron with another atom. e. move an electron from the second energy level to the valence shell.
The major function of interferon-gamma is to
A. Induce the activation of resident macrophages B. Inhibit migration of macrophages from reaction sites C. Promote and maintain the proliferation of T cells D. Promote B and T cell growth
Diagnosis of rabies is confirmed by
A) Gram stain. B) direct fluorescent-antibody test. C) patient's symptoms. D) passive agglutination. E) patient's death.