What cells do not divide regularly but can be stimulated to divide when necessary?
a. Nondividing
b. Mast
c. Mitotic
d. Facultative mitotic
d. Facultative mitotic
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Apical-basal patterning genes are expressed in
A. the basal region B. the apical region C. the central region D. the apical, basal, and central regions E. the apical and basal regions.
How efficient is cellular respiration in extracting the energy stored in the bonds of glucose?
a. 25% b. 33% c. 45%
d. 50% e. 80%
Cladograms are especially useful because they can indicate both the order and the timing of evolutionary events.
a. true b. false
How is phosphorylation important in a signal transduction cascade?
-Phosphorylation will shut down a signal transduction cascade, thus leading to an end of the signal. -A hormone will phosphorylate the entire cell, thus causing the cell to be marked for destruction. -Phosphorylation will turn an inactive protein into an active one, which triggers another response in the cell. -When the hormone itself becomes phosphorylated, it travels to all nearby cells and activates them to release more hormones of that same type.