In general, what is the effect of the type of medium on diffusion rate?
Answer: Diffusion rate is greater in fluid media than solid.
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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+.
A buffer system
a. makes new hydrogen ions. b. eliminates hydrogen ions already present. c. binds carbon ions. d. releases hydrogen ions. e. produce excess acid.
Ribbon worms have a unique __________ that is used to capture prey
A. proboscis B. tentacle C. set of jaws D. claw E. forked leg
The beta lactam nucleus is the basic structure of
A. The Ribosome B. Aminoglycosides C. Chloramphenicol D. Tetracycline E. Penicillin