During the third stage of aerobic respiration,
electrons and hydrogen ions released by the
reactions of the first two stages are picked up by
a. photosynthetic enzymes and ATP.
b. CO2 and H2O.
c. iron and glucose.
d. NAD and FAD
e. none of these.
Answer: d
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What will be accomplished by lowering the activation energy of a reaction?
A. The reaction will proceed more slowly. B. The reaction will reverse. C. The reaction will stop completely. D. The reaction will proceed more quickly.
Amphibians are not completely free to live on dry land because
A. their ancestors were fish. B. their food organisms live in water. C. their reproduction depends on water. D. they can escape from predators by jumping into the water. E. they obtain oxygen from water through gills.
Plant cells release hydrogen ions and oxygen
from H2O molecules in a. photosystem I. b. photosystem II. c. cyclic photophosphorylation. d. the light independent reaction. e. carbon fixation
A DNA nucleotide contains all of the following except _____.
A) a sugar B) a phosphate group C) an amino acid D) a nitrogen-containing base