A linear relationship between Vmax and enzyme concentration would be expected when
A) [S] << Km.
B) [S] >> Km.
C) [S] = Km.
D) both choices A and B
E) both choices B and C
C) [S] = Km.
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Genetic studies have identified an allele (32) that seems to provide protection against AIDS. Which of the following would most likely explain the reason why our population has this mutation?
A. Our bodies are designed to protect us against a myriad of pathogens. Our immune system was preparing for future viruses. B. This mutation likely benefited the human population against some other early pathogen. C. This mutation was initially harmful, but it now affords us protection against AIDS. D. Mutations that become prominent in a population initially were neutral but then become advantageous later on.
A scientist is searching for chemical compounds involved in embryonic limb development. He discovers a new compound that is transiently expressed in the limb, and only seems to affect cells in its immediate vicinity (up to a few cell lengths away)
How should the scientist classify this chemical compound? A. as an amine hormone B. as a peptide hormone C. as a steroid hormone D. as a paracrine factor E. as a neurotransmitter
When a person exercises, sensory input from moving muscles and joints results in an increase in cardiac output, causing blood pressure to be maintained, despite an increase in blood flow to the muscles
Indicate whether the statement is true or false
________ would produce the smallest evolutionary change in a given period of time in a population of birds.
A. Migration B. Gene flow C. Mutation D. Assortive mating E. Natural selection