Which of the following is not true of the formation of a bacterial translation initiation complex?
A. The 30S ribosome associates with the mRNA before the 50S ribosome.
B. N-formylmethionyl-tRNAfMet binds in the P site.
C. IF-3 binding to GTP is required for the charged tRNA to associate with the first mRNA codon.
D. IF-1, IF-2, and IF-3 dissociate upon the 50S subunit binding.
C
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Which of the following characteristics do all animals share?
A. They are multicellular prokaryotes. B. They are single-celled eukaryotes. C. They are multicellular eukaryotes. D. They are single-celled prokaryotes.
Some mutagens cause genetic changes that can be "corrected" by reexposing cells to the same mutagen. Other mutagens do not behave in this way. Provide one example of each of these two types of agents and describe the mutational changes caused in
Explain why some mutagens behave in one way, whereas others do not.
The extraembryonic membrane that contains fluid to cushion and protect the embryo is the __________
Fill in the blank(s) with the appropriate word(s)
Which of the following is NOT a potential impact of ocean acidification?
A) Decreasing H+ concentrations B) Coral bleaching C) Changes in metabolism of marine animals D) Increasing carbonic acid concentrations