What is the initiator triplet in both bacteria and eukaryotes? What amino acid is recruited by this triplet?
A) UAA, UGA, or UAG; no amino acid called in
B) UAA, UGA, or UAG; methionine
C) AUG; methionine
D) AUG; arginine
E) UAA, UGA, or UAG; arginine
Answer: C
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following amino acid would be characterized as __________ based on the chemical properties of
its side chain.
a. nonpolar
b. acidic
c. basic
d. hydrophilic
e. electrically charged
What percentage of Earth's productive land is currently used by the human population for crops and livestock?
A) 20% B) 75% C) 40% D) 55% E) 90%
Studies have determined that ____ is not responsible for the cyclical rise and fall of arctic hare and lynx populations
a. predation b. a limited food supply for hares c. predation by other mammals d. intraspecies competition e. disease
Experiments on competition among species within a community reveal that
A) removing a group of species has relatively little effect on a community. B) removing a single species has a stronger effect than removing a group of species from a community. C) removing a group of species has a stronger effect than removing a single species from a community. D) removing a single species has relatively little effect on a community.