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Metallic magnesium has a hexagonal close-packed structure and a density of 1.74 g/cm3. Assume magnesium atoms to be spheres of radius, r. Because magnesium has a close-packed structure, 74.1% of the space is occupied by the atoms. Calculate the volume of each atom; then find the atomic radius, r.
Volume of a sphere = (4Pir2)/3
If we ignore the possibility of crossing over, how many different combinations of chromosomes are probable in gametes of a single human.
Degrade a monoglyceride that has an 18-carbon fatty acid attached to it by Ester bonds. You will have to degrade the glycerol component followed by the fatty acid in presence of O2.
Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinate a response in the human body.
Activation of T cells requires that antigens be presented from antigen-presenting cells, not simply by exposure to the antigen in solution. What biological rationale may underlie this requirement - consider both from the perspective of how this can a..
Assume your friend Charles D., is a forty-five year old male who is newly divorced and is living by himself in a new home. He has told you about some health issues including weight loss.
Assume you make buffer solution by adding four gram sodium bicarbonate to 270 milliliters of water then titrate this solution to 30 ml of 0.1 molar HCl and find the equilibrium equation for this base/acid pair.
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair.
Trace the pathway this particle would probably take while moving from outside the cell to inside. What organelles will it pass through? Where will it be located within these organelles.
Assume that decomposers were removed from the forest ecosystem; predict what would happen to the rate of nitrogen cycling. Explain the logic behind your prediction.
A marine biologist has dredge up some unknown animal from the seafloor. Describe some of the characteristics she must look at to determine the animal phylum.
suggest an experiment to test. give the relationship between mtDNA and human ageing.
In an experiment you are studying a neuron that receives synaptic inputs from two other neurons: one from neuron A and one from neuron B. Illustrate a separate graph for each value of Vm.
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