Which organ is part of more than one organ system?
A. Stomach
B. Liver
C. Pancreas
D. Intestine
E. Brain
Answer: C
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How is a gradient of H+ ions formed across the inner mitochondrial membrane?
A. The electron transport chain uses energy from transfer of an electron donated by NADH to pump H+ across the inner mitochondrial membrane against its electrochemical gradient. B. ATP synthase generates a H+ gradient across the inner mitochondrial membrane. C. Electrons move from NADH to a chain of proteins with lower electronegativities. D. The electron transport chain uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient. E. The electron transport chain of proteins contains pores that are leaky to H+.
Coenzyme Q (also known as ubiquinone or CoQ) is often found in lotions and moisturizers. Given
what you know about its role in cellular respiration, infer what it might be doing in these products.
a. It helps glycolysis proceed faster in the cytosol of skin cells. b. It absorbs dangerous free radicals (loose electrons) that can cause aging. c. It decreases the rate of metabolism and slows cellular growth. d. It is absorbed and used by cells with a high metabolism. e. It causes older cells to spontaneously die and regenerates new cells.
Common megaplankton of the open ocean include all but
a. cnidarians. b. mollusks. c. gelatinous zooplankton. d. diatoms. e. salps.
____ are good habitats where local reproductive success is greater than local mortality
a. Metahabitats b. Sink habitats c. Source populations d. Source habitats e. K-selected habitats