The presence of free oxygen in the atmosphere is attributed mainly to which of the following?
A. volcanic activity
B. development of blue-green algae
C. formation of the outer core
D. formation of the inner core
Answer: B
Environmental & Atmospheric Sciences
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A) by the anticodon loop of tRNA B) by the residue at the 3' end of the tRNA C) by the residue at the 5' end of the tRNA D) By a nucleotide sequence on the tRNA which may or may not include the anticodon loop.
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Indicate whether the statement is true or false
Environmental & Atmospheric Sciences