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Q1. A red blood cell must squeeze through narrow blood capillaries without rupturing its membrane. The strength and flexibility of its plasma membrane depends on the dense cytoskeletal network that consists mainly of actin and spectrin molecules. A blood sample was analyzed to measure the intracellular actin concentration. Out of 10^10 red blood cells counted, 1 mg of actin was purified. Estimate the estimated millimolar concentration of actin in a red blood cell (the average volume of a red blood cell is 100 femtolitres and the actin coding DNA sequence is 1131 base pairs long). Calculations must be made assuming that the minimum significant number has four significant digits.
Q2. 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?
What organism produces the disease and how. Why is Anthrax such a potent weapon of bioterrorism? What are its characteristics that make it so.
What changes took place from one group to another. What advantages did each progressive group have over the last? Will you categorize each as more sucessful than the last.
Lipid metabolites are often seen as key elements in cellular signaling. Is this unique? Please provide several examples of the function of lipids as key elements in signal arrays and list the biologic functions these signals affect?
What communication channels may you choose for these different departments when delivering messages about the new accounting software system? Why would you choose these specific channels.
How to comprise the genotypes of both parents. The pronghorn of the United States and the saiga antelope of the central Asian steppes live in similar habitats and have alike adaptations. Which of the features would you be surprised to discover in a s..
The idea is that this arrangement will allow animals and plants to migrate between refuges. Why will such migration be important. Which of the compounds that normally protects the liver and other vital organs.
Describe why it may matter if the county had dry areas, swampy areas, forests, and meadows all within its boundaries. As a doctor, which of the statements are important factors for you to consider as you decide whether or not to remove the patient's ..
How will you find out the transcription factor binding sites in the whole genome. You have isolated a novel transcription factor. How would you decide the genes regulated by transcription factor in the whole genome.
What proportion of male children in a large family will finally develop baldness in a marriage where both husband and wife are heterozygotes with genotype HnHb?
If the centrioles are mispositioned in the cell, the functional mitotic spindle would fail to form. In this state, how will chromosome segregation be affected . Microtubules will not attach to kinetochores.
What specific effects might these toxins have on neuron function. How various plants of each of the four phenotypes do you expect.
Which pair will have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?
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