Which of the following is true?
A) There is a single aminoacyl-tRNA synthetase.
B) There are four different aminoacyl-tRNA synthetases, one for each different type of amino acid side chain.
C) A different aminoacyl-tRNA synthetase is required for each amino acid.
D) None of the above is correct.
C
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The three phases of the Cordilleran orogeny, in order from oldest to youngest, were the
____________________, ____________________, and ____________________. What will be an ideal response?
Which of the following has tentacles up 60 meters long?
A) Cnidarians B) Coccolithophores C) Ctenophores D) Foraminifers E) Radiolarians
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