The element in the body with the greatest number of atoms is
a. phosphorus.
b. oxygen.
c. hydrogen.
d. calcium.
e. carbon.
C
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Electron transport molecules that only transfer electrons include
A. ubiquinone. B. FAD. C. NADP. D. ferredoxin.
Which scientist specializes in categorizing and describing groups of organisms?
A) botanist B) entomologist C) herpetologist D) systematist
In feedback inhibition, the inhibiting molecule is often the
a. substrate of the inhibited enzyme. b. product of the inhibited enzyme. c. first unique molecule in the pathway. d. end product of the pathway.
Which of the following is true for the signaling system in an animal cell that lacks the ability to produce GTP?
A) It would not be able to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane. B) It could activate only the epinephrine system. C) It would be able to carry out reception and transduction but would not be able to respond to a signal. D) It would use ATP instead of GTP to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane. E) It would employ a transduction pathway directly from an external messenger.