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Approximately how many people in sub-Saharan Africa are infected with HIV? How many died in the last year?
Which of the following is a population.
In cells, the phosphorylation of glucose is the first step in glucose metabolism and is accomplished by addition of phosphate from ATP which generates ADP and Pi (G° = -7.3 kcal/mole). Therefore, in the cell there are two reactions coupled togethe..
Describe the physiological consequences and symptoms of atrioventricular block, and explain why a pacemaker might be used to treat this condition.
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.
When a cell is finished with the first cytokinetic division of meiosis I, how many strands of DNA are in the nucleus of one of the daughter cells?
Each olfactory receptor gene is involved in detecting specific odors. However, humans are losing OR genes, while mice and other mammals have ~ 1500 such gene.
Hair splits most easily along its fiber axis, whereas fingernails tend to split across the finger (sideways) rather than along it. What are the directions of the keratin fibrils in hair and in fingernails? Explain your answer in molecular terms.
The altered tRNA translates the UGA as tryptophan. What nucleotide varies has probably occurred in the mutant tRNA molecule? What consequences will the presence of such a mutant tRNA have for the translation of the normal genes in this cell.
With the help of the Nernst equation to calculate the equilibrium potential for these three ions.
Describe what is occuring at each of the stages of transcription(1,2,3). How does each stage move the process forward.
Lysozyme was assayed at bacterial cell wall, = 2.5x10-8 g. The Km for the substrate = 6x10-3g. At the end of one minute 2.5% of the cell wall hydrolysed.
Determine what cells in the testis are responsible for the maintenance of a blood-testis barrier that protects sperm from being attacked by the immune system?
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