Insulin stimulates an increase in number of glucose carrier proteins at a cell membrane's surface. What effect will insulin have on cell function? Choose all that apply.
A. Lack of membrane receptors for insulin will decrease amount of glucose taken in.
B. Low insulin levels will decrease the number of available carrier proteins.
C. An increase in insulin, which will increase the diffusion rate.
D. ATP amounts needed for this transport will increase.
Answer: C
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The phylogenetic trees of the nifH and SSU rRNA genes are incongruent because
A) nitrogenase is an anaerobic enzyme. B) nitrogenase evolves rapidly. C) of horizontal gene transfer. D) very few microbes have the nifH gene.
Banner-tailed kangaroo rats, Dipodomys spectabilis, are rodents endemic to (found only in) the deserts of the southwestern United States. Which of the following is the best description of their niche?
A. seed-eating rodents that compete with other seed-eating organisms for food B. found in parts of Arizona, New Mexico, Texas, and Mexico C. found primarily in Sonoran and Chihuahuan deserts D. found only in arid habitats E. found primarily in areas with relatively heavy soils
In the scientific name, Pan paniscus, Pan
represents the name of the ____ while paniscus represents the name of the ____.
a. family; species. b. family; genus. c. genus; species. d. species; genus. e. genus; family
All of the following are part of a prokaryotic cell except
a. DNA. b. a cell wall. c. a plasma membrane. d. ribosomes. e. an endoplasmic reticulum.