What would happen to the carbon cycle if all decomposers suddenly died and were not replenished?
What will be an ideal response?
Carbon would accumulate in organic matter
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AMP-activated protein kinase (AMPK) is an enzyme that is activated by high levels of AMP in cells. If levels of AMP are high in cells, that means that levels of ATP are low. Once active, AMPK activates catabolic pathways and inhibits anabolic pathways in the cell. Why do you think that is the case? Choose the answer that best explains the role of AMPK.
A. High levels of AMP indicate that there is a high amount of energy stored in the cell, thus activating catabolic pathways and inhibiting anabolic pathways are mechanisms to use stored energy. B. By inhibiting anabolic pathways, AMPK provides a mechanism to generate heat for the cell, which is important if AMP levels are high in the cell. C. By activating catabolic pathways, AMPK provides a mechanism to activate exergonic pathways, which is important if AMP levels are high in the cell. D. Activating catabolic pathways and inhibiting anabolic pathways will ultimately lead to higher consumption of ATP, which is important if AMP levels are high in the cell. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about AMP, ADP, and ATP in cells? What other information is related to the question? Choose Answer Do you have all the information needed to make a determination about the change in free energy? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What is NOT true about the human large intestine?
A. It contains three relatively straight segments with no villi. B. It compacts and stores undigested materials until their excretion as feces. C. Sodium, vitamin K and other bacterial metabolic products are absorbed across its wall. D. It is longer than the small intestine. E. About 4% of fluid absorption takes place in it.
Which of the following would most likely form electrolytes in water?
a. glucose b. ethanol c. an organic compound d. an inorganic compound e. a nonionic compound
Eastern and Western meadowlarks look almost identical and sometimes inhabit the same areas of prairies. These birds recognize members of their own species by distinctive songs and thus do not breed with each other. This is an example of
A) temporal isolation. B) ecological isolation. C) behavioral isolation. D) mechanical isolation. E) geographic isolation.