A point mutation that causes no change in the amino acid sequence of a protein is called a _____
A. synonymous (silent) mutation
B. nonsynonymous (missense) mutation
C. nonsense mutation
D. stop mutation
E. transition mutation
A
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Horizontal gene transfer in Archaea
A) is infrequent in nature and therefore difficult to use for genetic studies in the laboratory. B) has not been documented, thus all genetic studies of archaea are done via genomic sequencing. C) frequently occurs in nature and has been used to perform genetic studies in the laboratory as well. D) frequently occurs in nature, but there are very few laboratory studies because archaea do not cause human disease.
As a budding basic scientist you work in a research laboratory and discover a chemical that removes the cell wall from bacteria but leaves the organism undamaged otherwise. Things that the bacteria will lose because of this include:
a. The ability to move b. The ability to attach to other cells c. The ability to metabolize d. The ability to use oxygen e. The ability to have a gram stain result
Which is the largest division of the geologic time scale?
a. eon b. era c. epoch d. period e. millennium
Who was the first person to apply antiseptic techniques during surgery?
A. Ignatz Semmelweis B. Louis Pasteur C. Robert Hook D. Joseph Lister E. Paul Ehrlich