Nuclear magnetic resonance yields the best results when:
A. proteins have Mr > 25,000r.
B. two-dimensional NMR is utilized.
C. 13C and 15N are incorporated into the protein.
D. the number of "restraints" is reduced.
E. the pattern is recombined using the Fourier series.
C
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Which of the following is a phototroph?
A) a tree B) a mushroom C) bacteria growing on decomposing matter D) an earthworm E) a person
What is an ecotone?
a. a parasite that is external to the body b. a parasite that is internal to the body c. an example of an individualistic hypothesis d. a zone between two communities
e. the combination of species in an environment that is constantA very close association with two species is called:
a. adjoining. b. symbiosis. c. predator -prey. d. host-fungus. e. competition.
Plant roots absorb nitrate or ammonia and incorporate these compounds into plant proteins via the process of:
a. ammonification. b. denitrification. c. assimilation. d. nitrogen fixation. e. nitrification.