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Considering an E. coli promoter that could be recognized by a ?70-containing RNA polymerase holoenzyme, which of the promoter elements are always present, and which can be missing or altered? How does this E. coli promoter compare to a typical eukaryotic Pol II promoter?
Tay Sachs disease is inherited as an autosomal recessive. It is a devastating neurological disease that results from the lack of a normal enzyme "A" whose job is to metabolize lipids that are found in brain cells.
which statements about the sodium-potassium pump is true.
Assume your TA gives you a bacterial culture and claims there are 4.8 x 107 bacteria/mL in the culture. To check up on her, you prepare serial dilutions of 10-4 - 10-7.
In the fruit fly, the wild type purple eye color is produced through a combination of brown xanthommatin and bright-red drosopterin pigments.
Lysosomes are single membrane-enclosed, 0.2-0.5 m diameter spherical vesicles inside the cytosol of eukaryotic cells. Estimate the concentration of H+ inside lysosomes.
Characteristics of a malignant state include: 1) Dysregulation of the cell cycle and 2) Inhibition of apoptosis. These mechanisms are also hallmarks of a many viral infections? Why are these characteristics also beneficial to many viruses? Explain ho..
It has been established that incremental changes led to the development of a human eye. Closely examine the stages of development as seen in slide thirty-one of the Changes lecture.
What would be the effect of the same analogue on signal transduction of an epithelial cell after exposure to epidermal growth factor (EGF)? How would this compare to the effects of the cholera toxin on these same cells.
Phenylketonuria is extremely common in Ireland, affecting approximately 1 in 4500 live births. Determine the frequency of PKU carriers?
In a cross between a purple flowered plant and a white flowered plant, all 73 of the offspring had purple flowers. What are the most probable genotypes of the parent plants.
Calculate delta G for ATP hydrolysis when the concentration of ATP, ADP, Pi are all equal to 1mM. What is delta G when the concentration of ATP, ADP, and Pi when the concentration of ATP, ADP, and Pi are all equal to 2M?
Explain the process of Micturition, and describe the role of the autonomic nervous system as well as voluntary functions of the bladder.
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