Which aspect of population genetics can lead to changes in allele frequencies in a new mixed population following migration?
A) natural selection
B) mutation
C) gene flow
D) founder effect
E) bottleneck effect
C
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The first DNA comparison studies between humans and chimpanzees relied on which of the following?
A. The more complementary two strands of DNA are, the higher the melting point. B. The more complementary two strands of DNA are, the lower the melting point. C. DNA from different organisms won't combine to form a double helix. D. Proteins from chimpanzees would have a higher melting point than similar proteins from humans. E. Proteins from chimpanzee would have a lower melting point than similar proteins from humans.
A sample of milk is tested for its bacterial content in a plate count assay. A one-milliliter sample of the milk is diluted in a 1:10 dilution series. One milliliter of the third dilution tube is plated in a pour plate. After incubation, the plate has 54 colonies, indicating that the original milk sample contained
A) 54 cells per milliliter. B) 540 cells per milliliter. C) 5,400 cells per milliliter. D) 54,000 cells per milliliter. E) 540,000 cells per milliliter.
How does somatic recombination play a role in the formation of antibody genes?
What will be an ideal response?
The RNA polymerase ternary complex includes
a. sigma factor, core enzyme, rho factor, RNA, and DNA. b. sigma factor, core enzyme, RNA, and DNA. c. sigma factor, core enzyme, and DNA. d. sigma factor and core enzyme. e. core enzyme.