Cyclins modulate the progression of cells through the cell cycle by
A) directly activating G proteins.
B) inducing synthesis of constitutively active forms of growth cell receptors.
C) activating protein kinases that are critical regulators of cell division.
D) degrading histones.
E) increasing the production of DNA polymerases.
C) activating protein kinases that are critical regulators of cell division.
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The relationship of disease-causing organisms to an infected rabbit is one of
A. parasitism. B. commensalism. C. competition. D. herbivory. E. interference competition.
The left hemisphere of the brain is responsible for
a. music. b. artistic ability. c. spatial relationships. d. language skills. e. abstract abilities.
Viruses
A. consist of only a single cell. B. are smaller than cells. C. consist of multiple cells. D. contain a nucleus. E. are alive.
Which of the following does not cause a mutation?
A. evolution B. failure of DNA repair systems C. metabolic activity D. UV radiation E. replication errors