The chemistry of living systems representing all chemical reactions is called
A. metabolism.
B. catabolism.
C. anabolism.
D. thermodynamics.
E. enzymology.
Answer: A
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What would be the outcome if the pump protein shown in Fig. 5.13a instead acted as a carrier that allowed protons to move from the extracellular fluid into the cytoplasm?
A. The proton electrochemical gradient would be reversed. B. ATP could be synthesized from ADP + Pi. C. The number of protons on either side of the membrane would equalize. D. Two answer options are true: ATP could be synthesized from ADP + Pi AND the number of protons on either side of the membrane would equalize.
Which animals are typically osmoconformers?
a. freshwater teleost fishes b. sharks c. birds d. marine teleost fishes e. freshwater invertebrates
Which of the labeled graphs above represents the age span of worker bees primarily occupied by
foraging?
a. A b. B c. C d. D e. E
Fossil and genetic evidence strongly supports the idea that modern humans
A) independently arose from three different ancestral Homo species in Africa and Eurasia. B) all derive from a single African lineage that spread from there into other parts of the world starting about 50,000 years ago. C) derive from an African lineage but also have genes derived from mixing with several Eurasian descendants of Homo erectus. D) derive from Neanderthals that independently evolved the features of modern humans in Europe and Africa.