Four of the five answers listed below are
involved in engineering and expressing a
recombinant DNA molecule. Select the
EXCEPTION.
a. DNA ligase
b. DNA polymerase
c. restriction enzymes
d. plasmid
e. bacteria
B
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How big are most cells?
a. 10-20 nanometers b. 10-20 micrometers c. 10-20 millimeters d. 10-20 centimeters e. 10-20 meters
The phrase "all or nothing," used in conjunction with discussion about an action potential, means that
a. a resting membrane potential has been received by the cell. b. nothing can stop the action potential once the threshold is reached. c. the membrane either achieves total equilibrium or remains as far from equilibrium as possible. d. propagation along the neuron is saltatory. e. the action potential is strong.
The evolutionary species concept states that for a population to be declared a separate species:a
it must have diverged significantly from other populations. b. it must be morphologically different from any other population. c. it must not interbreed with any other population. d. it must occupy a different niche than any other population. e. it must have undergone natural selection sometime in its history
All of the following are reasons why the icosahedral shape is a common viral shape that affects animals EXCEPT:
A. Lots of energy is conserved when using this structure B. The lipid portion of envelope the virus encodes for protects it from environmental damage C. Plenty of room inside for nucleic acid D. Identical protein subunits are used to build the shape E. Genetic economy occurs