Which of the following is NOT a target of drugs that inhibit protein synthesis?
A) the shape of the 30S ribosomal subunit
B) interference with alanine-alanine bridges
C) the enzymatic site of the 50S ribosomal subunit
D) movement of the ribosome from one codon to the next
E) the tRNA docking site
B
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Members of the phylum Thermotogae can be found growing in
A. the intestinal tract of mammals. B. soils of the Antarctic. C. marine salterns of the shore of the Dead Sea. D. marine hydrothermal vents and terrestrial solfataric hot springs.
These contain enzymes that digest various substances
a. mitochondria b. Golgi bodies c. nuclei d. ribosomes e. lysosomes
In Escherichia coli, if ?70 is not bound to RNA polymerase core enzyme, active transcription of the gene is not occurring.
Answer the following statement true (T) or false (F)
Place the following steps for the cloning of a gene in order:1. DNA ligase seals foreign DNA into a plasmid.2. A restriction enzyme is used to cleave DNA. 3. The bacterium makes a product. 4. Some of the bacterial cells take up a recombinant plasmid. 5. The plasmid replicates on its own.
A. 5,1,4,3,2 B. 2,1,4,5,3 C. 3,1,2,4,5 D. 1,2,3,4,5 E. 1,3,2,4,5