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Two types of signals have been implicated in metaphase checkpoint arrest. Consider the results of a recent experiment in which the unattached kinetochore of a monoattached chromosome was destroyed by a laser beam. It was found in this study that, following destruction of the kinetochore, the cell entered anaphase even though this chromosome was not properly aligned at the metaphase plate. How might you interpret this experiment in terms of the checkpoint signals?
If C-1 of glucose is radioactively labeled & then enters glycolysis, which carbon of G-3-P will be labeled? Determine what fraction of the molecules will carry radioactive label?
Many eukaryotic mRNAs, but not bacterial mRNAs, contain introns. Describe how these sequences are removed during the production of mature mRNA.
A cross is made between individuals of genotypes AA : bb x aa : BB. The F1s are then testcrossed. The following data is obtained.
Describe each of these problems. Which areas worldwide are suffering the most from these problems.
What might be the environmental consequences if a significant amount of surfactant were to get into a pond?
Suppose that Meselson and Stahl had carried out their experiment by growing cells in medium with 14N and then transferring the cells to medium containing 15N.
how can You characterize a new enzyme's kinetics. No, the activity does not change with increasing enzyme concentration correctly. The enzyme may be only active in a dimer that forms a high concentration.
what will be all the constituents of the medium used to select exconjugants that have aquired the ala+ allele?
Describe why you agree or disagree that “genetically modified organisms” can influence evolution and how does the development of these organisms support evolution?
How does vibration of the tympanic membrane ultimately produce the fluctuation in membrane voltage in the cochlear hair cell?
Find the time td when the death occurs assuming this trigonometric environmental temperature and give the time on the clock. td = . Time on the clock = : AM, where the minutes are a decimal value with at least 4 significant figures.
Fully explain why the excessive use of antibiotics may lead to nutritional disorders in humans.
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