During a dive, the partial pressure of dissolved gases increases by about 1 atm for every ____ in depth
a. 1 meter
b. 5 meters
c. 10 meters
d. 15 meters
e. 20 meters
C
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Once bound to a hormone, this receptor becomes active and catalyzes the transfer of a phosphate group to itself or intracellular proteins.
A. G-protein coupled receptor B. enzyme-linked receptor C. ligand-gated ion channel receptor D. mechanoreceptor E. thermoreceptor
The primitive template that was thought to be
used for forming chains that resemble proteins or nucleic acids was
a. meteorites that landed in the oceans. b. clay particles in tidal flats. c. sulfur that precipitated out of hydrothermal vents. d. rusty rocks. e. magma spewed from early volcanic activity
Which of the following statements is TRUE
about NADPH? a. It is an enzyme. b. It is the oxidized form of NADP+. c. It is generated n the light-dependent reactions of photosynthesis. d. It accepts hydrogen and electrons from carbohydrates. e. It obtains energy from ATP.
The subunit of a kidney that purifies blood and restores solute and water balance is called a
a. glomerulus. b. loop of Henle. c. nephron. d. ureter. e. urethra.