Moves in the genome through an RNA intermediate
Match the description with the appropriate term.
retrotransposon
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The antibiotic rifamycin is selectively toxic in blocking protein synthesis in Mycobacterium tuberculosis because
A. the antibiotic binds to the mRNA once synthesized, preventing it from participating in the initiation complex with the ribosome. B. it binds preferentially to bacterial RNA polymerase rather than the eukaryotic protein, effectively halting transcription in the pathogen but not the host. C. bacterial ribosomes are 70s whereas host ribosome are 80s, thus the antibiotic binds to the M. tuberculosis ribosome but does not bind to the eukaryotic machinery. D. the drug binds to the initiator tRNA, preventing the formation of the protein synthesis initiation complex in the bacterial cell.
If mRNA is not modified what will result? a. The mRNA will not be able to leave the nucleus
b. The cell will self destruct. c. Mutation. d. The new protein will become activated earlier. e. The DNA code will become altered.
Fungi digest macromolecules by ________.
A. phagocytosis B. active transport C. intracellular digestion D. extracellular enzyme activity
Which of the following is incorrectly paired with its result?
A. increase in filtration pressure - increase urine volume B. decrease in concentration of plasma proteins - decrease in filtration pressure C. decrease in concentration of plasma proteins - increase in urine volume D. decreased sympathetic stimulation - increase in urine volume E. increased sympathetic stimulation - decrease filtration pressure