When macrophages bind antigens, they secrete
____ to attract more phagocytic cells.
a. more antigens
b. MHC
c. cytokines
d. antibodies
e. complement
C
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________ of prokaryotic genomes are now available in public databases
A) Dozens B) Hundreds C) Thousands D) Millions
What is the name for a symptom of viral disease in plants that causes decreased cell growth in leaves?
a. cell necrosis b. hyperplasia c. hypoplasia d. galls
The primary reservoir for calcium that is released during excitation-contraction coupling in a skeletal muscle fiber is the
A. troponin. B. endoplasmic reticulum. C. transverse tubules. D. sarcoplasmic reticulum. E. Golgi bodies.
The original Cell theory includes all of the following EXCEPT:
a) the cell is the most primitive form of life. b)cells arise by division of preexisting cells. c) the cell is structural unit of life. d) many organisms are composed of more than one cell e) all of these are included in the Cell Theory. Cells can arise from noncellular material.