The "electrochemical gradient" that determines how a charged ion will move through a permeable membrane depends on
A. the electrical forces acting on that ion.
B. the difference in concentration of that ion on either side of the membrane.
C. the ratio between the charge on the ion and its atomic mass.
D. the combined effects of electrical forces and concentration differences across the membrane.
E. All of the choices for this question are correct.
D. the combined effects of electrical forces and concentration differences across the membrane.
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Compare and contrast the blending and particulate models of heredity
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The enzyme that facilitates a reaction adding a phosphate group to a three-carbon sugar while removing a hydrogen would most likely be named
A. triose phosphate dehydrogenase. B. phosphoglyceromutase. C. pyruvate kinase. D. phosphofructokinase.
Which structural feature of Gram-positive bacteria enhances their ability to retain the crystal violet dye?
a. an outer membrane b. a thin peptidoglycan layer c. a thick peptidoglycan layer d. All of the above contribute to a Gram-positive cell's ability to retain crystal violet.
Pseudomonas aeruginosa is resistant to many antimicrobics.
a. true b. false