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The formation of severe weather events like cyclones are caused by changes in the


An extensive research program is underway in Los Angeles in order to obtain at least one specimen of Arabidopsis thaliana, a common weed that is resistant to salt and has violet flowers (a very rare characteristic). The allele determining resistance to saline media corresponds to SOS+ (Salt Overly Sensitive) and is dominant over SOS- (the plant becomes more sensitive to salt); on the other hand, the height is determined by the H allele, being recessive in stems exceeding 2.5 - 3 dm in height. What is the probability of obtaining the specimen that the experts are looking for from two trihybrid individuals, knowing that there is dominance for the three characters?


Give an account of the total ATP yield when I molecule of glucose convert carbon dioxide and water

- Briefly explain why we incubate the purified plasmid with the restriction enzymes, BamHI and XhoI, at exactly 37oC. 


Assume the linear fit of the standard curve using DNSA absorbance at 540nm versus glucose concentration in M is y=0.002x + 0.003. Calculate the concentration of an unknown solution of glucose with DNSA absorbance at 540nm of 0.17.



What is the importance of nucleic acid studies in elucidation and treatment of diseases

State three errors of nucleic acid metabolism, note in each case the defective enzyme




In the histological specimen of connective tissue stained with hematoxylin-eosin one can see ramified cell that are in contact with one another. In general the cell form a network structure the spaces of which contain cord of lymphocytes. Which tissue is it


A lawyer sets out to prove that a child with type A blood is the son of a man with type B blood and a mother with type AB blood. Determine if it is possible for the man to be the father. Is he definitely the father?



a. Test cross method



b. Genotypic Ratio



c. Phenotypic ratio

The unknown concentration of glucose in solution B is high, so we need to do a dilution before getting the absorbance reading. Explain how to prepare 20 times dilution of solution B.

4- Assume the linear fit of the standard curve using DNSA absorbance at 540nm versus g.


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