In the capillaries of the lungs, O2 diffuses ________ and is bound to ________.
Fill in the blank(s) with the appropriate word(s).
inward; hemoglobin
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Estrogen is a lipid soluble hormone that can easily cross membranes. Knowing this, what can be concluded about estrogen receptors?
A. The receptors would be coupled to a G-protein. B. The receptors would be linked to enzymes that triggered a kinase cascade. C. The receptors would be found inside the cell. D. The receptors would be on the plasma membrane. E. The receptors would also be lipid soluble and able to cross membranes.
Energetically favorable reactions help cells build biomass
What will be an ideal response?
What kind of pathogen would retain its ability to cause infections after being treated with powerful proteolytic chemicals that would destroy all proteinaceous material?
A. A viroid B. A bacterium C. A fungus D. A virus E. A prion
A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, the following characteristics are noted: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to
A) mosses. B) charophytes. C) ferns. D) gymnosperms. E) flowering plants.