Different aminoacyl-tRNA synthetases:
A. may bind the same amino acid.
B. may bind the same tRNA.
C. do not appear to recognize the same features of tRNAs.
D. will always recognize both the acceptor stem and anticodon sequences of tRNAs.
E. will always recognize the complete tRNA anticodon sequence.
C
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Male zebra finches behave differently toward familiar neighbors, whom they largely ignore, and unfamiliar singers,
whom they attack and drive away. This behavior is a result of ____.
a. operant conditioning b. classical conditioning c. cognition d. imprinting e. habituation
Analysis of the sequences of the small subunit rRNA generated a shift in our current taxonomic scheme, with the addition of three levels called domains. What are the three domains?
What will be an ideal response?
When was the largest extinction in Earth's history?
A) the current time B) Cretaceous C) Permian D) Cambrian
Members of the genus Thermomonospora ________.
A. can be isolated in compost piles and hay B. spores can form on either aerial or substrate mycelia C. produce single spores on their mycelia D. All of the choices are correct.