In the biosynthesis of glycerol, the reduction of dihydroxyacetone phosphate produces what important precursor molecule?
A. Glycerol 3-phosphate
B. Coenzyme A
C. Dihydrogen monoxide
D. Phospholipids
Answer: A
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Cells may enter stationary phase because of
A. the depletion of an essential nutrient. B. the accumulation of toxic waste products. C. a lack of available oxygen. D. All of the choices are correct.
When two species have overlapping niches and one species is excluded by the other, it is an example of
a. a fundamental niche. b. competitive inclusion. c. a realized habitat. d. intraspecific competition. e. competitive exclusion.
Which of the following anemias is associated with a vitamin B12 deficiency?
a. aplastic b. pernicious anemia c. hemolytic anemia d. leukemia e. iron-deficiency anemia
The process by which cells acquire specialized forms and functions is called
A. cell differentiation. B. cell replication. C. cell growth. D. cell elasticity. E. None of the choices are correct.