Adding a phosphate or sugar group to a newly made protein is an example of ________
A) a posttranscriptional modification
B) a pretranscriptional modification
C) an intron removal
D) gene silencing
E) a posttranslational modification
E
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Many species might coexist in a particular environment by occupying different ecological
A. biomes. B. niches. C. territories. D. domains. E. ranges.
Bilateral symmetry is characteristic of
a. cnidarians. b. sponges. c. jellyfish. d. flatworms. e. corals.
Hair cells are important in the sense of
a. equilibrium. b. hearing. c. taste. d. smell. e. both equilibrium and hearing.
The acceptance of the cell theory forced the rejection of what earlier concept?
A. That the Earth was at the center of the solar system. B. That life could form by spontaneous generation. C. That all life on Earth was immutable, which means unchanging. D. That no species could clone itself as a means of reproduction.