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You have recently been hired by a research team that studies cystic fibrosis (CF), a fatal disorder that clogs the lungs and other organs with a viscous, sticky mucous that interferes with breathing and digestion. The leader of your research team has informed you that a major fraction of the mucous in CF patients consists of filamentous actin. His hypothesis is that this actin may play a key role in interfering with breathing and digestion in CF patients. In order to test your laboratory skills and knowledge he decides to give you a quiz.
Your first assignment is to assemble actin monomers into filaments. In a test tube you mix actin monomers with KCl, MgCl2, and ATP and then measure filament assembly
Your boss immediately notices that there is a lag phase before actin filaments can be detected and that the "%actin in filaments" plateaus at less than 100%.
Explain the lag phase and why the percent of actin in filaments peaks at a value less than 100%
provide an explanation of how bacterial species are defined. clearly state how the concept of a bacterial species differs from that of the biological species concept used with animals and plants.
A man with type A blood marries a woman with type B blood. Their child has type 0 blood. What are the genotypes of these individuals? What other genotypes, and in what frequencies, would you expect in offspringfrom this marriage?
Detail the hormones responsible for maintaining fluid and electrolyte balance. Critically discuss the three primary buffering systems.
Assume if a person has a kidney transport maximum for glucose of 150 mg/min, a glomerular filtration rate of 100 mL/min, a plasma glucose level of 250 mg/100 mL,
Calculations must be made assuming that the minimum significant number has four significant digits. If all of phosphorus in a 3.00 gram sample of MgNH4PO4 is extracted and used to make a diphosphorus pentaoxide, what mass of P2O5 could be produced.
Plasma membrane with surface area of 5000 µm2; there are 106 phospholipid molecules per µm2 in each leaflet of the membrane; there are 3000 molecules of flippase enzyme associated with plasma membrane.
Develop a general mathematical relationship for the number of surface atoms (N_s), number of volume atoms (N_v), and total atoms (N_t) for cubic particles in terms of "n," where n = number of atoms along a side of cubic nanoparticle.
Describe about how various kinds of systematic variations in the Earth's orbit.Describe the results and give the genotype of the P.
Understanding types of symbiosis Interspecific interactions can be categorized by whether each species in the interaction benefits, is harmed, or is neither helped nor harmed.
Explain the main types of extracellular signaling.
Discuss why determinants for optimal microbial growth rates that are determined in pure cultures in the lab do often not correlate to those determinants in natural environments.
explain the energetic of catalysis in simplest terms.
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