Which molecule(s) is/are responsible for delivering the high energy electrons from the citric acid cycle
to the electron transfer system?
a. NADH only
b. FADH2 only
c. Both NADH and FADH2
d. Cyt C and Q
e. ATP and ADP
C
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For a chemical bond to form:
A. the process must be exothermic, releasing energy upon bond formation. B. the total energy of the system must be higher in the bonded state than in the nonbonded state. C. one of the atoms must be more electronegative than the other. D. the process must consume more energy than it takes to break the bond. E. the temperature of the system must be low, slowing the molecular motion of the atoms.
A pollination syndrome is:
A. the synchronous release of pollen by many individuals of wind-pollinated trees B. specializations of plants that attract a specific kind of pollinator C. the simultaneous release of two sperm, one to affect fertilization and the other to initiate formation of endosperm D. a brushlike tongue of hummingbirds to which pollen adheres E. a series of bristles on the backs of insects to which pollen adheres
The ________ in sperm whales is thought to play a part in the whale's echolocation system
a. rostrum b. ambergris c. spermaceti d. melon
The most ancient branching point in the phylogeny of animals is the one that distinguishes between having:
a. single cellularity and multicellularity. b. radial or bilateral symmetry. c. defined tissues or no tissues. d. growth by molting or by continuous additions. e. first gut opening develop into a mouth and first gut opening develop into an anus.