What is the initiator triplet in both prokaryotes and eukaryotes? Which amino acid does this triplet recruit?
A) AUG; methionine
B) UAA; no amino acid called in
C) UAA or UGA; arginine
D) UAA; methionine
E) AUG; arginine
A
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A small group of islanders leave "island A" and travel to "island B." After several generations on island B, a researcher finds that a large percentage of the population is left-handed. Left-handedness is a relatively rare trait on island A. A genetic event that explains this is
A) a population bottleneck. B) genetic load. C) a founder effect. D) natural selection.
Four of the five answers listed below are macronutrients. Select the exception
a. phosphorus b. sulfur c. nitrogen d. copper e. magnesium
In a lipid bilayer, __________ fatty acid tails face each other within the bilayer and form a region that
excludes water. a. hypertonic b. hyperosmotic c. hypotonic d. hydrophilic e. hydrophobic
A tissue is a group of ____
a. closely associated, similar cells. b. closely associated, different cells. c. loosely associated, different cells. d. identical cells that split a variety of functions. e. loosely organized, similar cells