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1. Design two (hypothetical) inhibitors for chymotrypsin using itsreaction mechanism. Explain the concept of your design and mechanisms for inhibition.
2. Explain how antiviral drugs, AZT and ddC, inhibit HIV reversetranscriptase activity. What may be the potential problems for this class of drugs?
Assume you observe the following numbers of individuals of each genotype in a population. AA=700, Aa=200, aa=100. What are the observed genotype frequencies in this population?
Propose a hypothesis to explain the current decline in Songbird numbers. Design an experiment that could test your hypothesis.
Explain the dose-response relationship between exercise and risk of death from coronary heart disease.
The total pressure of a mixture of water vapor and helium is 0.893atm. The partial pressure of water is 27.3Torr at this temperature. For helium, what are (a) the partial pressure and (b) the mole fraction in this mixture?
AIDS is often treated with a "cocktail" of several antiviral agents at once. Why is the cocktail more effective than a single agent? What is a physician trying to prevent by prescribing several drugs at once?
Describe the difference between the ionic and covalent bonds. Describe the functions of the three specialized tissues in plants.
mechanism for ensuring adequate amount of neurotransmitter.
Although standard redox potentials of NAD+ and NADP+ are essentially the same, and both are capable of carrying high-energy electrons, they are used in very distinct reactions in cells.
What could be the base sequence of the RNA after transcription happens? Explain the importance of first and last codons? Specify the meaning do these codons have for the protein synthesis?
describe boyle's law and how inhalation and exhalation follow from this law. identify the muscles involved in quiet inhalation and those additionally required for forced inhalation. Which spirometry measurements indicate the extent of quiet and fo..
Elite controllers are pople with HIV infection whose immune systems naturally keep levels of the virus extremely low. Researchers are conducting genome-wide SNP analyses of these people.
Explain how natural selection occurs, using at least three examples from natural populations. include the three factors necessary for selection to operate as well as the environmental conditions causing the selection.
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