The resting potential of a neuron is due to all of the following except:a
potassium being at a higher concentration inside the cell than out.
b. sodium being at a higher concentration outside the cell than in.
c. cells being more permeable to potassium than to sodium.
d. the cytosol containing large molecules having a net negative charge.
e. the sodium/potassium pump transporting 3 Na+ into the cell for every 2 K+ out
E
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When bacteria are exposed to nutrient-poor conditions, they form thick-walled structures that contain the chromosome and a small amount of cytoplasm. These structures are called
A. plasmids. B. pseudomonads. C. nucleoids. D. endospores. E. exospores.
What type of thinking is required?
What will be an ideal response?
The ultimate source of all energy in a
terrestrial ecosystem is a. the organic matter in all the organisms of the ecosystem. b. electrons from water molecules. c. sunlight. d. ATP. e. inorganic mineral ions in the soil.
An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to _____
A) change the atmosphere from oxidizing to reducing B) make it easier to maintain reduced molecules C) cause iron in ocean water and terrestrial rocks to rust (oxidize) D) prevent the formation of an ozone layer