I need to determine if the gene for a particular protein is the same length in frogs, humans, and trees. Which method(s)
will be most helpful to me?
a. PCR and agarose gel electrophoresis
b. DNA cloning and PCR
c. DNA cloning only
d. PCR only
e. agarose gel electrophoresis only
ANSWER: a
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How many copies of each gene are present in these skin cells at G2 of interphase?
A. 2 B. 4 C. 6 D. 8
Arrival of an action potential at a presynaptic cell's axon terminals triggers the release of __________, a type of
chemical signal. Fill in the blank(s) with the appropriate word(s).
Stanley Miller's experiment was concerned with the idea that
A. life originated in outer space. B. life originated by biogenesis. C. life originated by spontaneous generation, but biogenesis followed. D. organic molecules could be formed from gases in the early atmosphere.
A population of squirrels is in a phase of exponential growth. Which events would act to slow this growth? (Check all that apply)
A. heavy rainfall, resulting in larger seed and nut harvest B. logging of nut trees C. growth of the hawk population D. increased population that is outstripping food supply E. less competition from a diminished population of ground squirrels F. a forest fire that destroys habitat