When an aminoacyl-tRNA synthetase charges a tRNA, which molecule is released?
A. mRNA
B. ATP
C. AMP
D. pyrophosphate
E. AMP and pyrophosphate
E. AMP and pyrophosphate
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Microbes called the group I archaea or mesophilic Crenarchaeota that were found to oxidize ammonia in marine environments are now placed in the phylum ________.
A. Korarchaeota B. Crenarchaeota II C. Thaumarchaeota D. Euryarchaeota
When DNA fragments are inserted into plasmids, the resulting recombinant molecules must be introduced into ____ in
order for the DNA to be replicated.
a. rabbits b. humans c. bacteria d. mice e. chimpanzees
Which of the following elements is a plant micronutrient?
1.Calcium 2.Iron 3.Potassium 4.Sulfur
Which of the following is the best explanation for the fact that most transduction pathways have multiple steps?
A) Most of the steps were already in place because they are steps in other pathways. B) Multiple steps in a pathway require the least amount of ATP. C) Multiple steps provide for greater possible amplification of a signal. D) Each individual step can remove excess phosphate groups from the cytoplasm. E) Each step can be activated by several G proteins simultaneously