Which of the following steps in the Kreb's cycle directly produces a molecule of ATP (or GTP)?
a. citrate ? isocitrate
b. isocitrate ? ?-ketoglutarate
c. succinyl CoA ? succinate
d. succinate ? fumarate
e. malate ? oxaloacetate
C
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In mutualism
A. the mutualist is dependent on the host. B. the partners will not survive separately in many cases. C. a reciprocal benefit accrues to both partners. D. All of the choices are correct.
Adenylyl cyclase is to cAMP as ________ is to IP3.
A. protein kinase A B. Raf1 C. phospholipase C D. calmodulin E. protein kinase C
The pulmonary circuit specifically circulates blood ________
A) from the heart to the lungs B) from the heart to the rest of the body C) from the heart to the brain D) from the heart to the liver
What is the term for someone who searches for and researches fossils?
A. paleontologist B. ecologist C. physicist D. entomologist E. geologist