The progression from metaphase to anaphase is triggered by
a. activation of protein kinases by MPF.
b. ubiquitin-mediated proteolysis of key proteins.
c. binding of an inhibitory protein to MPF.
d. depolymerization of the mitotic spindle.
Ans: b. ubiquitin-mediated proteolysis of key proteins.
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Which number identifies the site where activators bind?
a. 2 b. 3 c. 4 d. 5 e. 6
The ability of animals to adjust to seasonal changes in temperature is called:a
acclimatization. b. estivation. c. homeostatic adjustment. d. torpor. e. hibernation.
______________ links adjacent amino acids together.
a) Amino-glycosidase b) Peptidyl transferase c) Aminoacyl-tRNA synthetase d) Glutamine synthetase
The archaea known as halophiles
A) require temperatures above 45?C to survive. B) require salt concentrations of 9% or greater to survive. C) are members of the phylum Euryarchaeota. D) are members of the Euryarchaeota and require temperatures above 45?C. E) are members of the Euryarchaeota and require salt concentrations above 9%.