Which of the following is not useful for producing proteins in large amounts?
A. bacteria
B. yeast
C. insect cells
D. mammalian cell culture
E. transgenic animals
D
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What is the purpose of the Durham tube?
What will be an ideal response?
In biotechnology research, DNA fragments created by restriction enzyme action are separated from one another via
A) filtering. B) crossing over. C) gel electrophoresis. D) centrifugation. E) PCR.
In Figure 8.4, the antibiotic chloramphenicol binds the 50S ribosome as shown. From this information you can conclude that chloramphenicol
A) prevents transcription in eukaryotes. B) prevents translation in eukaryotes. C) prevents transcription in prokaryotes. D) prevents translation in prokaryotes. E) prevents mRNA-ribosome binding.
If two sister species on the phylogenetic tree above differ from the other two in a single character state (say dark or light fur), how many character state changes (evolutionary events) are needed to explain this pattern?
a. one c. three b. two d. four